Глобализация спорта (на примере футбола)

Raffaele
Poli

University
of Lausanne and University of
Neuchâtel,
Switzerland

raffaele.poli@unil.ch

Understanding
globalization through football: The new international division of
labour, migratory channels and transnational trade circuits

Over
the past 20 years, the problematic of globalization has become a
recurring theme in the social sciences. Today it has largely outgrown
the economic sphere where it first came into being [4]. The
multiplicity of possible approaches to globalization obliges the
researcher to have a prior clarification of the concept, in order to
avoid the risk of making it ‘a buzzword for journalists and the
latest generation of vacuous futurolo-gists’ [32].

Regarding
sport, Bale and Maguire [3] have elaborated an analytical distinction
between five different ‘scapes’ [2] of globalization, each of which
comprises the movement of a particular entity: materials for
‘technoscapes’, money for ‘financescapes’, images and information for
‘mediascapes’, ideas for ‘ideoscapes’ andpeople for ‘ethnoscapes’.
The scope of this article will focus on the exclusive development of
the thematic of the international mobility of sporting talents,
especially that of footballers. This case study is particularly
interesting for two reasons: the existence of professional
championships in a large number of countries and the importance of
the international flow of players that football generates.

The
article is structured in three parts. First, it presents three
perspectives on globalization, clarifying them using references from
researchers having worked in the domain of football player
migrations. In the second part, it examines the geography of the
international flows of footballers and it analyses the quantitative
evolution of the presence of expatriate players in the five principal
European leagues (English Premier League, Spanish
Primera
Liga,
Italian Serie A, French
Ligue
1,
German Erste Bundesliga) [8]. The aim is to verify if the general
increase in international flows reflects a spatial diversification of
migratory routes, or if privileged recruitment channels between the
departure and arrival areas still exist. In the third part, we
analyse the empirical functioning of transfer networks. The example
of three ideal-typical upward career paths of African players having
attained the English Premier League is used to illustrate the
functional integration of leagues beyond national borders.

From
a theoretical point of view, the article is based on relationnism.
Contrary to substantialism, which ‘takes its point of departure the
notion that it is substances of various kinds (things, beings,
essences) that constitute the fundamental units of all inquiry’, the
paradigm of relationnism promotes a view of the society which
highlights ‘the primacy of contextuality and process in sociological
analysis’ [13]. From this perspective, the purpose of the article is
to show that the general tendency of increase in the international
flow of athletes does not occur by itself, as a natural feature of
the contemporary world, but concretely depends on the actions of a
plurality of actors who, by the relations they build on a daily
basis, are responsible for the interconnection between specific zones
of departure and arrival. Generally speaking, globalization is not
seen as an outcome that actors cannot influence, but as a structural
process directly linked to human agency.

Perspectives
on globalization and relational approach of footballers’ mobility

Depending
on the manner in which globalization is envisaged, Held
et
al.
[19]
have classed researchers into three categories: the ‘sceptics’, the
‘hyperglobalists’ and the ‘transformationnists’. The sceptics hold
that the concept in itself is not justified insofar as it refers to a
relatively old process of internationalization linked to the
worldwide diffusion of capitalism. According to their point of view,
‘recent growth of international flows represents rising in
interactions between well-defined national economies, rather than the
emergence of global economic activity’ [32]. For Brenner,
globalization proceeds by rounds and the current phase is only ‘the
most recent historical expression of
a
longue
durée
dynamic
of continual deterritorialization and reterritorial-ization that has
underpinned the production of capitalist spatiality since the first
industrial revolution of the early nineteenth century’ [4]. In the
case of the migration of footballers the perspective of Lanfranchi
and Taylor [20] can be put into this category. According to Taylor,
‘football migration is nothing new, but has a long and complicated
history’ [46]. For the same author, ‘much of the writing on football
migration has tended to employ »globalization» uncritically, as if
it were an established fact rather than a contested concept’. In the
sceptics’ vision, historical continuity is preferable to a view that
emphasizes rupture, such as that held, contrarily, by the
hyperglobalist perspective.

The
hyperglobalists consider that the concept of globalization is not
only justified, but is the only proper conceptual framework with
which to analyse the contemporary world. From their perspective
‘globalization has created a single economy transcending and
integrating the world’s major economic regions’ [32]. From now on, we
live in a world where states have lost a large part of their power.
As they are no longer able to limit the international circulation of
goods, services and merchandises, states have to be content with
encouraging them by the setting up of regulatory frameworks that are
less restrictive than in the past [45]. With the development of the
NTIC and the process of the annihilation of space by time [18], the
erosion of state power is the key aspect on which hyperglobalist
researchers insist.

Applied
to football, this perspective has been amply used to account for the
juridical changes that have come about from 1995 onwards, when the
Bosman ruling by the Court of Justice of the European Community
liberalized circulation within the EU for players holding a
communitarian passport [11]. After having focused their attention on
the general increase in international flows of athletes — a hitherto
little-studied topic suddenly became worthy of scientific attention —
several researchers distanced themselves from the hyperglobalist
vision, by notably highlighting the geographical selectivity of the
flows [26, 29, 38].

The
third perspective on globalization is defined as transformationnist.
Contrary to the sceptics, the transformationnists consider that
globalization is a new process comprising a spatial interdependence
on a transnational scale that has not been seen before. A distinction
is made between internationalization and globalization. According to
Peter Dicken, while internationalizing processes involve the ‘simple
geographical spread of economic activity across national borders with
low levels of functional integration’, the globalizing ones involve
‘both extensive geographical spread and also a high degree of
functional integration’ [9]. In the case of internationalization, the
change is more quantitative in nature, while in case of globalization
it is more qualitative. The key feature of globalization is the
development of economic circuits functionally integrated beyond
national borders, to which authors usually refer by the terms of
‘global commodity chains’ [15] and ‘global production networks’ [9].

The
desire to understand the manner in which a functional integration
process intervenes within the framework of the football players’
labour market necessitates taking into account the transfer networks
of players as an analytical unit, rather than the players
individually or the macro-economic structures in which they are
integrated. As Dicken et al. have duly remarked, we think that in
order to understand the functioning of the global economy, it is
necessary ‘to transcend »atomistic description» of activities of
individual actors or meta-individual imaginations of »deep»
structures’ [10]. In the manner of Granovetter, we believe that ‘the
analysis of processes in interpersonal networks provides the most
fruitful micro-macro bridge. In one way or another, it is through
these networks that small-scale interaction becomes translated into
large-scale patterns, and that these, in turn, feed back into small
groups’ [16]. Within the paradigm of relationnism, the analysis of
interactions between actors in networks allow us to understand how
the latter ‘globalize’ the world, from the point of view of
strategies deployed to create or take advantage of opportunities, as
well as the constraints that limit or influence their actions.

In
taking into account criticisms made by numerous authors regarding the
a-spatial vision of globalization [27, 28, 44, 47], according to
which all frontiers disappear, we have built our analysis with the
help of approaches developed in the context of studies of migration
which are based on the notions of networks [30] and channels [14].
Starting from the figurational view of the society promoted by
Norbert Elias [12], networks are considered as sets of functionally
interdependent individuals. In interlinking with each other, networks
form the base of society. They are seen as dynamic social
configurations constructed by actors, that both allow and set the
boundaries of their actions. While not all individuals have the same
room for manoeuvre within networks, and do not have the same
possibilities to elaborate new ones, an initial starting position can
progress positively or negatively according to the astuteness of the
strategic choices made.

In
the case of the footballers’ transfer market, networks are made up of
a plurality actors playing distinct and complementary roles. From a
relational perspective, each flow is a concrete, empirical and
synthetic output of networks involving, among others, club officials,
managers, agents, talent scouts, investors and, last but not least,
players themselves and quite often also their relatives. These actors
collaborate to make transfers possible and compete to appropriate the
financial added value generated by the latter. As a consequence of
this reasoning, we consider that no flows occur without the
participation of multiple stakeholders who are directly or indirectly
linked each other, and whose decision-making power is greater or
lesser according to circumstances and opportunities.

While
the importance of networks and intermediaries in the mobility of
athletes is widely recognized [36, 42], the emphasis in literature on
the migrations of athletes has been placed more often on their
individual motives. From this perspective, Maguire [23] has
identified different types of athletes, grouped according to their
migration experience: ‘pioneer’ type migrants, ‘mercenaries’,
‘nomadic cosmopolitans’, ‘settlers’ and ‘returnees’. In a similar
fashion, Magee and Sugden [22] have added to the previous typology
the categories of ‘ambitionist’, ‘exile’ and ‘expelled’. As Maguire
and Elliott highlight, ‘when examining research located in the area
of athletic labor migration, it is evident that the majority of the
work has focused on the motivations and experiences of migrant
athletes’ [24]. Nevertheless, the fact remains that the focalization
on individual motives and experiences of athletes runs the risk of
atomizing the research and tends to lose sight of structural
constraints imposed on any player wishing to migrate.

Other
studies on the mobility of athletes have taken the structural
inequalities between countries as an analytical entity. Principally
carried out to account for migrations of African players in Europe,
these analyses emphasize the political mechanisms of economic and
cultural domination [6]. From a neo-Marxist perspective, Darby et al.
hold, for example, that the recruitment of footballers carried out by
European clubs in Africa ‘may clearly be interpreted as an extension
of broader neo-imperialist exploitation of the developing world by
the developed world’ [7].

The
focalization on the political stakes in migrations from a
macro-economic perspective entails the risk of forgetting the
importance of the actions of individuals who, by their competencies
and strategic choices, can influence positively the structures in
which they are embedded and of which they are not merely passive
actors. While it allows us to understand economic logics and the
underlying power games at stake in the migrations of sportsmen, the
macro-structural perspective does not furnish the analytical and
conceptual tools to understand more precisely the socio-spatial
logics at work.

Contrary
to what is usually undertaken by researchers following world-system
theory or the neo-classic approaches based on the individual rational
choice theory, network theories on migration insist on the fact that
migratory channels must be carefully traced and described ‘instead of
being left to external and elusive macro-determinations’. In a
relational framework, migration appears indeed ‘as being less the
residual factor of a confrontation between supply and demand on the
international labour market than the expression of global dynamics
generated by human interactions’ [30].

Having
recourse to a relational approach in the study of globalization gives
us the possibility to concretely understand the manner in which
actors take into account the constraints and opportunities linked to
economic, cultural and power differentials existing between
territories. In the case of the trade of footballers, such as in
other domains of economic life, the relational framework aims at
understanding how human actions are reflected spatially and organize
in the final instance the dynamics of flows.

Volume
and spatiality of international flows

The
concept of globalization is generally associated with the process of
the new international division of labour. Contrary to the pre-global
international division of labour, within which the industrialized
countries (the centre) sought from non-industrialized ones (the
periphery) raw materials and agricultural products, the new
international division of labour manifests itself by a relocalization
of part of the industrial production in certain countries of the
former periphery. This process can be defined as ‘an emergent form of
worldwide division of labour associated with the internationalization
of production and the spread of industrialization’ [31]. Controlled
from a few global cities [43], the major transnational companies no
longer look only for markets or raw materials from Southern
countries, but also for a labour force that is considered to be
‘cheap to buy, abundant, and well disciplined’ [48].

The
analytical framework of the new international division of labour is
also applicable in the context of professional football. While, in
the industrial sphere, the relocalization of production is reflected
in a strong increase of products made in countries having
progressively acquired an advantage regarding human capital and
factors of production (notably in South-East Asia), in professional
football such a process is born out of an increase of the number of
players imported from South America and Africa.

Figures
1 represent the number of expatriate players taking part in the
‘big-5’ European leagues during the seasons 1995/96 and 2005/06,
according to their country of origin. The statistical data used for
the purpose of this article have been gathered together by the
Professional Football Players Observatory (PFPO), a French-Swiss
research group co-founded by the author. The origin of players is
defined here independently from the nationalities they may have, as
the country where they grew up and from which they departed following
recruitment by a club overseas. Only flows directly linked to
football are thus taken into account. The choice of seasons for the
comparison was made with respect to legal changes regarding
international flows of players (Table 1). The 1995/96 season is
indeed the last prior to the application of the aforementioned Bosman
law.

Table
1.
Evolution
of the composition of the labour market in the ‘big-5′ European
leagues according to players’ origin

Number
of

players

Number
of

expatriate
players

%
of expatriate

players

1995/96

2286

463

20.2%

2005/06

2586

998

38.6%

Evolution

+
13,1%

115%

91%

a

b

Figure
1.
Number
of expatriate players in the ‘big-5’ European leagues according to
their country of origin: a) 1995/96 season; b) 2005/06 season

Henceforth,
in the five major European leagues, almost four footballers out of
ten have come to the country where they work following a professional
international migration. The increase in the number and the
percentage of expatriate players has continued over the last four
seasons. In 2008/09, there were 1107 expatriates in the ‘big-5’
leagues, representing 42.6 percent of the total number of footballers
[36].

From
1995 to 2005, in absolute terms, all geographical origins have
participated in the increase of expatriate footballers. However, the
relative values indicate today a higher proportion of Latin American
and African players among expatriates, to the detriment of
footballers from Western Europe, and, even more so, from Eastern
Europe (Table 2).

Table
2.
Evolution
of the proportion of expatriates according to zone of origin

Western
Europe

Eastern
Europe

Latin
America

Africa

Others

Total

1995/96

39.1%

29.4%

16.6%

10.6%

4.3%

100%

2005/06

35.4%

14.8%

28.6%

16.2%

5.0%

100%

Difference

-3.7%

-14.6%

12.0%

5.6%

0.7%

0%

From
1995 to 2005, clubs of the best European leagues have recruited
players from Africa and Latin America even more than in the other
countries of the continent. Consequently, the proportion of
non-European expatriate players has increased in two ways, in
comparison with the global pool of players, as well as relative to
expatriate footballers. In absolute terms, while the number of
expatriates from Western and Eastern European countries has increased
from 317 to 502 (+58.3%), the number of non-Europeans has augmented
from 146 to 496 (+240%). While on the increase in all the leagues,
the proportion of the latter still changes greatly according to
country.

Regarding
international recruitment, Spanish, French and Italian clubs are
clearly more orientated towards other continents than English or
German ones (Table 3). This result is a first indication of the
spatial selectivity of the international flows of footballers. This
phenomenon can be fully understood by having recourse to the
‘migratory channels’ analytical framework [14].

Table
3.
Evolution
of the proportion of non-European players among expatriates according
to country of employment

England

Germany

Spain

France

Italy

1995/96

16.7%

18.3%

42.3%

60.3%

41.1%

2005/06

26.1%

32.3%

68.0%

73.2%

65.2%

Difference

9.4%

14.0%

25.7%

12.9%

24.1%

In
the study of the migration of highly qualified personnel, different
researchers have shown the importance of networks to enhance and
organize international flows. Assuming that ‘most international
migrants depend on intermediaries to help them to achieve employment
and housing in another country’, Findlay and Li consider that the
‘intermediary agencies, by channelling information and resources,
have an influence in moulding the process of international
migration’. This forms the basis for the ‘migratory channels’
framework, so that ‘channels not only reflect the existence of a
migration system, but are also responsible for the structuring of the
system’ [14].

According
to Meyer, the emergence of persons and enterprises who play an
intermediary role in a professional capacity, ‘confirms the fact that
globalization of the highly skilled labour market does not occur
without massive network investment’ [30]. The same logic can be
applied to the migration of footballers, even though the latter, in
particular Africans, due to their early age of migration1
and a departure abroad most often without a signed work contract, can
rather be considered as ‘migrants to be qualified’ [35]. The
intersection of the geographical origin of expatriates and the
countries in which they exercise their profession confirms the
existence of privileged relations between territories (Table 4).

Table
4.
Spatial
distribution of expatriate players by zone of origin according to
league (2005/06 season)

Germany

Italy

Spain

France

England

Total

Latin
Americans

15.60%

28.70%

37.40%

12.50%

5.80%

100

Africans

9.00%

11.50%

3.40%

57.20%

18.90%

100

Eastern
Europeans

42.80%

15.50%

8.10%

14.10%

19.50%

100

Western
Europeans

18.90%

9.20%

12.30%

8.50%

51.10%

100

The
strongest concentration pertains to African footballers: 57.2 percent
of footballers of this origin play for French clubs. Western European
expatriates are highly concentrated in England, while Eastern
European ones are over-represented in Germany. Finally, Latin
Americans are very present in Spain as well as in Italy, and are the
least concentrated players in a single country. They are, however,
clearly over-represented in these two Latin countries.

The
inequality of the distribution of expatriate footballers according to
their origin is confirmed by significant Chi-square tests for both
the 1995/96 and 2005/06 seasons. The intensity of the relation has
only diminished slightly in 10 years: Cramer’s V value has gone from
0.44 to 0.4. The general increase in the international flow of
players during the first 10 years after the Bosman law has thus not
been reflected in a significant spatial diversification of transfer
networks. On the contrary, it has led to a quantitative reinforcement
of older channels. The operation of the latter continues to depend on
criteria such as geographical proximity (Germany-Eastern Europe,
England-Scandinavia, Ireland and other UK nations) or historical
links (Spain-Latin America, Italy-Latin America, France-old African
colonies, England-USA and Australia). The evolution observed is not,
however, the same for all the zones of origin studied (Table 5).

Table
5.
Contribution
to the Chi according to zone of the origin

Africa

Latin
America

Eastern
Europe

Western
Europe

Total

1995/96

23.9%

18.1%

21.5%

36.5%

100

2005/06

36.3%

30.2%

10.2%

23.3%

100

Difference

12.4%

12.1%

-11.3%

-13.2%

The
evolution of the contributions to the formation of the relation
expressed by the Chi-square value according to the zone of origin of
expatriate footballers shows that, in comparison with Africans and
Latin Americans, Europeans tend towards a more homogenous
distribution between the leagues taken into account. From the point
of view of geography, the introduction of free movement for EU
players has above all resulted in a more equal spatial redistribution
in the different championships. Indeed, during the 1995/96 season,
European expatriate footballers were even more concentrated in
Germany and in England than they were 10 seasons later. On the other
hand, for non-Europeans, the growth took place in a selective manner,
from leagues where players from these origins were already
over-represented before the Bosman law was decreed. This process has
led to higher levels of concentration of Africans in France, such as
of Latin Americans in Italy and in Spain.

The
different geographies of international recruitment carried out by
European clubs in relation to their home country clearly indicate
that economic factors (differentials in riches) and legal ones (quota
systems) cannot by themselves explain the totality of dynamics at
work in the international trade of footballers. Like Maguire and
Pearton, we believe that ‘although economics play a crucial part in
determining the patterns of football migration, they are by no means
the only factor involved. Rather, a set of interdependences contour
and shape the global sports migration’ [25]. To fully understand what
is at stake, it is indispensable to analyse in detail the manner in
which places are put into relation by different types of actors
playing the role of intermediaries in the midst of transfer networks.

Transfer
networks and functional integration of spaces

Up
until now, we have studied the presence of expatriate players in
Europe from the perspective of stocks. In a context of high
professional mobility, it is also necessary to analyse the career
path of players from a longitudinal point of view. It thus becomes
possible to grasp the complexity of the underlying spatial stakes of
the trade and migrations of footballers, especially when more than
two countries are concerned.

If
we speak jointly of trade and migrations of football players, it is
because the latter, in the economic context particular to this
activity, are not just simply workers under contract with a club.
They also have to take on the status of commodities. Indeed, by their
transfer, different types of actors, from club managers to players’
agents, aim to set up value added chains. In order to achieve this,
they seek to gain profit from the economic differentials existing
between clubs and leagues by ‘buying’ or ‘placing’ a player in a club
and then transferring him for money to a team with more means at its
disposal.

In
order to clarify this idea, we present three examples of upward
career paths that have characterized African footballers playing or
having played for Premier League clubs in England. The choice of
examining only upward career paths was made so as to be fully aware
of the speculative logic (creation of value added chains) that
structures the transfer market for players. The decision to study the
career paths of African players in England is valid for two reasons.
The first is the high mobility of Africans: they change club every
2.4 seasons, whereas the average for players as a whole is 2.9 [36].
The second is that the English championship, with a turnover of 2.4
billion euro in 2007/2008, is today the richest football competition
in the world [8]. English clubs are capable of attracting a large
number of expatriate stars. During the 2008/09 season, 59.3 percent
of players in the Premier League were expatriates.

The
first example of an upward career path is that of Emmanuel
Eboué.
This
player was born on 4 June 1983 in Yopougon, one of the 10 communes
that make up the Abidjan agglomeration. At a very young age he was
part of a local organization called Cooper Ecole
de
Football,
named after its founder, Innocent Anzan, nicknamed ‘Cooper’ [33]. He
was discovered during a friendly match by the
Académie
MimoSifcom
of Abidjan, a training centre founded in 1994 by the French trainer
Jean-Marc Guillou and the club ASEC Mimosas Abidjan. He became a
full-time member of the organization on 10 October 2001. Less than
one year later, he was transferred to KSK Beveren, in Belgium, a club
of which Jean-Marc Guillou had become a shareholder. After two and a
half seasons in Flanders and marriage to a Belgian woman, he was
recruited by Arsenal in January 2005. Thanks to the very good
relations between
Arsène
Wenger,
the Arsenal manager, and Jean-Marc Guillou,
Eboué
had
already been on a training camp for three weeks with Arsenal during
the summer of 2004. Emmanuel
Eboué’s
career
path is particularly interesting because it reflects the existence of
a migratory channel set up by club officials. This channel linked the
Ivory Coast to England, with a stage via an intermediate country,
Belgium, where the conditions to obtain a work permit for non-EU
players are less restrictive than in England.

The
second example of an ideal type of upward trajectory is that of
Michael Essien. This midfielder was born in the neighbourhood of
Awutu Senya, in Accra, on 8 December 1982. Thanks to a scholarship
awarded for his football talents, he spent three years at Saint
Augustine’s Senior Secondary School (Cape Coast). On his return to
Accra, Micheal Essien became part of the Liberty Professionals FC
team. He was then picked for youth teams for Ghana. In 1999, he took
part in and won the under 20s African Cup of Nations. The same year
he played in the under 20s World Cup, where Ghana took third place.
Essien was spotted by recruiters from Manchester United, who invited
him to England for a training camp. However, the player was already
under contract to a French players’ agent, the former goalkeeper
Fabien Piveteau, an associate of Sly Tetteh, the president and
co-founder of Liberty Professionals FC. Manchester United suggested
to Micheal Essien that he play for the Belgian partner club of Royal
Antwerp in order to have the time to acclimatize himself to European
football and to fulfil conditions necessary to obtain a work permit
for across the Channel2.
The player refused and made his way to his agent’s house in Monaco.

Essien
took part in a first trial at Lille and a second at Bastia, a club
for which Fabien Piveteau has played from 1996 to 1998 during the
last stage of his professional career. In August 2000, Michael Essien
signed his first professional contract for the Corsican club. Three
years later, after some excellent performances, he was transferred to
Olympique Lyonnais in exchange for 11.75 million euro3.
After two years at Lyon, Essien requested and obtained a transfer to
Chelsea in London, who paid 38 million euro for him. This figure is
the highest so far that has been paid for the recruitment of an
African player. Michael Essien’s trajectory is particularly
revelatory of the role of players’ agents in the management of the
flow of footballers. Indeed, in most cases, more than the players or
the managers of clubs, it is the latter, thanks to their connections,
who contribute to the setting up of migratory channels that the
footballers end up by following (Poli, 2004a).

A
third ideal-type upward career path is that of Henri Camara, a
forward born in Dakar on 10 May 1977 to parents of Guinean origin. At
an early age, he became part of one of the two flagship clubs of the
Senegalese capital: ASC Jaraaf Dakar. In 1999, he was recruited by
Racing Club of Strasbourg via the intermediary of the trainer Claude
Leroy and the Swiss agent Nicolas Geiger. After having spent many
years as a coach in Africa, including Senegal, Claude Leroy was at
the time the sporting director of the Alsace club. Nicolas Geiger was
himself active in Africa and had tipsters in Senegal and in Cameroon.
Camara’s transfer was settled in Dakar on 7 July 1999 and the player
arrived in France on 20 July of the same year. The managers of RC
Strasbourg paid a commission fee of 1.7 million euro to the Team
Consult company based in Vevey, in Switzerland, and belonging to
Nicolas Geiger4.

On
6 September 1999, Camara was loaned to Neuchatel Xamax club, then
trained by Alain Geiger, brother of the agent. After a year and a
half in Neuchatel, Camara was transferred to Grasshoppers of Zurich,
where he stayed for six months winning the Swiss championship. In the
summer of 2001, free from all commitments following legal
proceedings5,
Henri Camara signed for CS Sedan through the intermediary of his new
and powerful agent, the Franco-Senegalese Pape Diouf, a former
journalist who later became the president of Olympique de Marseille.
After two seasons, Camara was transferred to Wolverhampton Wanderers
for a sum of around 3 million euro, via the intermediary of the
associate of Pape Diouf for the English market, the Scottish resident
of Monaco, William McKay. In 2004, the player refused to stay at
Wolverhampton Wanderers, which, in the meantime, had been relegated.
He was subsequently loaned for six months to Celtic in Glasgow, and
for an additional six months to Southampton. The following year
Wolverhampton Wanderers accepted a bid to sell the player to Wigan
Athletic for the sum of 4.6 million euro. Henri Camara moved then to
West Ham United, went back to Wigan Athletic and was loaned out again
to Stoke City. He is now under contract with Sheffield United. Aged
33, his financial worth is henceforth close to zero.

Generally
speaking, the three ideal-typical examples presented show to what
extent the migration of African footballers to Europe is carried out
through privileged relations between different types of actors (club
officials and managers, agents, players, private investors) who
interact within the framework of transfer networks. The setting up
and development of the latter is part of a logic of creation of value
added chains in which players are supposed to acquire worth through
movement. Spatially, these circuits very often involve more than two
countries. They are indeed usually constructed so as to take
advantage of the economic differentials existing between leagues.
Within the structure of the international trade of footballers, the
different spaces and clubs through which the players transit take on
complementary statuses. This allows us to propose a typology of
spaces.

The
‘platform’ space defines the first country to which the player comes
from his federation of origin (for example, France for Essien or
Belgium for Eboue). The ‘stepping stone’ space is a country from
which a players gains access to another country where the sporting
and economic levels of the championship are higher. For example,
Switzerland and France have played this role for Henri Camara. The
‘transit’ space is defined as the country where the player passes
through and leaves and where the level of competition to which he is
used to remains unchanged (no example for the trajectories cited).
The ‘relay’ space is defined as the country to which the player was
loaned before returning to the country from where he came (for
example, Scotland for Camara). The ‘destination’ space is that
hosting the wealthiest leagues and clubs of the world (England in
this case).

The
constant coming into contact of these different types of spaces
within the framework of players trade provokes a functional
integration of football leagues on a transnational level and,
according to the transformationnist point of view, justifies the
recourse to the concept of globalization.

Conclusion

It
is time to invert the research perspective showing how the analysis
of commerce and international migration of footballers serves to
better understand the process of globalization, notably by
underlining the central role that human intermediation plays in the
economic construction of competitive advantages [40] and in the
dynamics of spatial inequalities. Throughout this article we have
shown that the analytical and conceptual tools developed within the
framework of the study of globalization can also be applied to the
case of trade and migrations of footballers. It is also true that the
analysis of this specific case allows us to better understand the
mechanisms at work in the wider context of economic globalization.

The
example of football permits us in the first place to show the
critical role played by intermediaries in the formation and
development of migratory channels. This argument can also be applied
to the functioning of the global economy as a whole. While the study
of the social relations of production remains important, the example
of football demonstrates that it is just as important to examine the
‘social relations of circulation’ [37] of both men and commodities.
The necessity to adopt a biographical approach to fully understand
‘the social life of things’ has been also underlined by Appadurai,
who highlights the necessity in ‘breaking significantly with the
production-dominated Marxian view of the commodity and focusing on
its total trajectory from production, trough exchange/distribution,
to consumption’ [1]. This realization is more pertinent than ever at
an epoch where the growing fragmentation of production provokes a
very strong increase in the flow of goods and makes itself felt at
the level of the increasing amount of power held by intermediaries
[5]. The latter play a crucial role in the management of these flows
and largely determine their spatiality. The footballers’ transfer
market is a perfect case to shed light on this process.

The
example of football also shows that the creation of economic
opportunities is intrinsically linked to the characteristics of the
actors involved: their biographies, their linguistic skills, their
trust relationships, etc. Put together, these individual
characteristics largely determine the formation of migratory
channels, which in the football industry take the form of transfer
networks. As a consequence, the advantages regarding the recruitment
of players abroad cannot be seen as uniquely stemming from factors of
a ‘purely’ financial nature, such as, for example, the differences in
the means at the disposal of clubs according to the territories
concerned by the flows of players. If financial gaps matter, these
advantages are also socially constructed according to the profiles of
actors who are at the root of the setting up and development of
transfer networks.

This
realization can also be applied to the wider context of economic
action and of globalization from an economic perspective. As
underlined by Mark Granovetter with the notion of ‘social
embeddedness’ [17], within the framework of production and commerce
of goods, the social and political stakes that guide the actors’
actions are very often as important, or more so, as the stakes linked
to a ‘pure’ economic rationality, supposedly objective and equal for
all. The example of the international trade of footballers clearly
shows that the functional integration of spaces on a transnational
level is brought about firstly in a relational manner, according to
the social capital [41] that the actors involved in transfer networks
have at their disposal or are able to mobilize.

In
bringing to light the importance of human intermediation, the study
of footballers’ transfer market also allows us to highlight the fact
that globalization cannot be considered as a ‘simple’ structural
outcome, which is external to actors in networks and networks of
actors. Though actors seek to take advantage of existing economic
differentials, by their daily activities, they also contribute to
create them. Their strategic choices have indeed an impact in the
constant production or reproduction of competitive advantages. This
always occurs in a selective manner, through the mobilization of
relational resources whose spatial projection never covers the world
in a homogenous fashion.

Generally
speaking, the study of the case of football players’ transfer market
reveals the necessity, as underlined by David Ley, to ‘bring the
issue of human agency to a globalization discourse that has
frequently been satisfied with speaking of a space of networks and
flows devoid of knowledgeable human agents’ [21]. The example of the
migrations and commerce of footballers fully demonstrates the
imperative of replacing the agency of human actors and the social
embeddedness of their actions at the heart of the analysis of this
crucial process of the contemporary world. Notes

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1
The
age of the first international migration of Africans present in the
five principal European leagues during the 2008/09 season was 18.6
years of age. This average was 21.4 years of age for the group of
expatriate players as a whole [36]

2
In
order for a non-EU player to be eligible for a work permit in
England, he must have played at least three-quarters of the matches
for his national team during the two years prior to the transfer.
From 2009 onwards, if a permit is to be renewed for more than one
year, the player must also pass a test verifying his skills in
English.

3
The
figures mentioned here were sometimes made public by the clubs. They
are also taken from the sporting press and thus may not be exact.
They nevertheless give a good idea of the magnitude of the sums at
stake.

4
This
information was made public in December 2006 in the context of an
inquiry by a Strasbourg public prosecutor. Claude Leroy was the
subject of investigation for the misuse of public funds, forgery and
uttering. Nicolas Geiger had already collaborated with Claude Leroy
within the framework of the transfer of the Cameroonians Pierre
Njanka and Joseph Ndo. During the past 10 years, this Swiss agent
has transferred to Europe many Cameroonian and Senegalese players
(Thimothee Atouba, Papa Bouba Diop, Demba Toure, Albert Baning,
Kader Mangane, etc.).

5
Racing
Club of Strasbourg had at the time sought to block the transfer by
arguing that the player still belonged to them by virtue of the
signing of a ‘preference agreement’ in September 2000 valid until 30
June 2001. RC Strasbourg maintained that the pact had been
countersigned by the player on 16 May 2001, which Camara had always
denied, and demanded 12.5 million euro as ‘damage compensation’, as
was provided for by a clause in the contract, in the event of the
player signing with another club. The legal commission of the French
Nation Football League finally dismissed the case and fined the
Alsace club 15,000 euro for not having homologated contracts agreed
with the player as it is stipulated in the regulations.

Роль углеводов во время двигательной активности (результаты исследований, воплощенные в практических рекомендациях)

Carbohydrate
during exercise:
research
of last
10
years turned
into
new
recommendations

ASKER
Jeukendrup

Gatorade
Sports Science Institute, Barrington, IL, USA

School of Sport and Exercise
Sciences

University
of Birmingham, Edgbaston, Birmingham, UK

Introduction

We
are all aware that carbohydrates and fats are
the
most important fuels during exercise. This has
not
always been the case. Till the late 1800s it was
believed
that protein was the most important source
of
energy for muscle. In the early 1900s it was
discovered
that not protein but carbohydrate was
an
important fuel for exercise [27]
.
In 1939 a paper was published that showed
that
carbohydrate use during exercise could be
influenced
by diet and that this could improve exer­
cise
tolerance [4]. In the
1960s
it became clear that muscle glycogen played
a
significant role [2] and in the 1980s the first studies showed that
carbohy­
drate
ingestion during exercise improved exercise
capacity
[5, 7].
In
the years that followed the field did not advance
much
until 2004, which marked the beginning of a
series
of major breakthroughs with respect to car­bohydrate feeding
during exercise. These break­throughs and their effects on sports
nutrition guide­
lines
will be discussed in this review article.

As
new information became available over time, recommendation for
athletes evolved as
well.
Although on most recent guidelines, it is
generally
accepted that carbohydrate intake is important to optimise endurance
performance,
recommendations
are not very specific [36]
.
For example,
the
most recent guidelines by the American College of Sports Medicine
state that a carbohydrate
intake
of 30-60 grams per hour is recommended
during
exercise, but does not
specify
the type of activity, the level of athlete etc.
Does
this mean that these general recommen­
dations
are appropriate for everyone from recrea­tional football player
to professional cyclist?

With
the evidence from studies and new insights
obtained
in the last 5-10 years it is possible to provide
much
more prescriptive and precise advice to athletes.
It
is beyond the scope of this review to discuss all the
underlying
evidence in great detail, as this has been done in several other
recent reviews [17, 19-21, 23], but the purpose of
this
review is to bring all the different pieces of infor­
mation
together and translate our current understan­
ding
into practical guidelines for athletes competing in different events.

Carbohydrate
ingestion
during
exercise
and
performance

Although
the exact mechanisms are still not
completely
understood, it has been known for some
time
that carbohydrate ingestion during exercise
can
increase exercise capacity and improve exer­
cise
performance [18, 19]
.
In general during exercise longer than
2
hours, carbohydrate feeding will prevent hypogly-caemia, will
maintain high rates of carbohydrate oxi­
dation
and increase endurance capacity compared
with
placebo ingestion. As little as 20 g/h carbohy­
drate
is already sufficient to observe a performance
benefit
during prolonged exercise [12, 28]
.
It was be­
lieved
that the exercise duration had to be around 2h or longer for the
carbohydrate feeding to be ef­
fective.

However,
more recently, it has become clear that
also
during shorter duration exercise of higher inten­
sity
(for example 1h around 75%VO
2max),
carbohy­
drate
ingestion during exercise can improve perfor­mance. The mechanism
behind these performance improvements is completely different. In
fact it was
demonstrated
that when glucose was infused into the systemic circulation, this
glucose was taken up at high rates but no performance effect was
found.
This
provides evidence that increasing glucose availability, as a
substrate to the working muscle,
has
no effect during this type of activity. Interesting­
ly,
however, when subjects rinsed their mouth with a
carbohydrate
solution this resulted in performance
improvements
[21] and
these
were similar to the improvements seen with
carbohydrate
ingestion. There are numerous studies
now
that confirm these initial findings. These studies
are
reviewed in several recent papers reviews [17, 19-21, 23]
.
This
would
suggest that the beneficial effects of carbohy­
drate
feeding during exercise are not confined to its
conventional
metabolic advantage but may also con­
tribute
top a more positive afferent signal capable
of
modifying motor output [14]
.
These effects are specific to carbohydrate

and
are independent of taste [3]
.

It
is likely that receptors in the oral cavity me­
diate
these effects but such receptors have not
yet
been identified in humans and the exact role
of
various brain areas is not clearly understood.
However,
it has been convincingly demonstrated
that
carbohydrate is detected in oral cavity by uni­
dentified
receptors and this can be linked to im­
provements
in exercise performance [21]
.
New guide­
lines
suggested here take these findings into ac­
count
(Table
1
).

Table
1.
Carbohydrate
intake recommendations during
exercise
for exercise of different durations

Mode
of carbohydrates consumption

Duration
of load

Type
of carbohydrates

Recommendations

Small
amounts or mouth rinse

30-75
min

Single
or
multiple
transportable
carbohydrates

Nutritional
training highly recommended

Inside
30 g·h
-1

1-2
h

Single
or
multiple
transportable
carbohydrates

Nutritional
training recommended

Inside
60 g·h
-1

2-3 h

Single
or
multiple
transportable
carbohydrates

Nutritional
training highly recommended

Inside
90 g·h
-1

>
2,5 h

Glucose:
fructose
only

Nutritional
training essential

Practical
implications
of
the mouth rinse studies

These
results suggest that it is not necessary to
ingest
large amounts of carbohydrate during exer­
cise
lasting approximately 30 min to 1 hour and a
mouth
rinse with carbohydrate may be sufficient to
get
a performance benefit (
Table
1
).
In most condi­
tions
the performance effects with the mouth rinse
were
similar to ingesting the carbohydrate drink, so
there
does not seem to be a disadvantage of con­
suming
the drink, although occasionally athletes
may
complain of gastro-intestinal distress when con­
suming
larger amounts. When the exercise is more
prolonged
(2h or more), carbohydrate becomes a
very
important fuel and to prevent a decrease in per­
formance
it is essential to ingest carbohydrate. As
will
be discussed below, larger amounts of carbohy­
drate
may be required for more prolonged exercise.

Prolonged
exercise and multiple
transportable
carbohydrates

Different
carbohydrates ingested during exer­
cise
may be utilised at different rates [19]

but until a landmark publication
in
2004 [16] it was believed that carbohy­
drate
ingested during exercise could only be oxi­
dised
at a rate no higher than 1 g/min (60 g/h)
independent
of the type of carbohydrate [22]
.
This is reflected in guide­
lines
which typically recommend an upper limit of intake around 60 grams of
carbohydrate per hour
during
endurance exercise (>1h) [39].

It
appears that exogenous carbohydrate oxida­
tion
is limited by the intestinal absorption of carbo­
hydrates.
It is believed that glucose uses a sodium
dependent
transporter SGLT1 for absorption, which becomes saturated at a
carbohydrate intake around 60 grams per hour. When glucose is
ingested at this
rate
and another carbohydrate (fructose) that uses a
different
transporter is ingested simultaneously, oxi­
dation
rates that were well above 1 g/min (1.26 g/
min)
[16] can be observed. A se­
ries
of studies followed in an attempt to work out the maximal rate of
exogenous carbohydrate oxidation.
In
these studies the rate of carbohydrate ingestion
was
varied and the types and combinations of carbo­
hydrates
varied. All studies confirmed that multiple
transportable
carbohydrates resulted in (up to 75%)
higher
oxidation rates than carbohydrates that use
the
SGLT1 transporter only [18, 19]
.
Interestingly such high oxidation rates could not only be achieved
with carbohydrate
ingested
in a beverage but also as a gel [34]

or a low
fat,
low protein, low fibre energy bar [35]
.

There
are several studies that link the increased
exogenous
carbohydrate oxidation rates observed
with
multiple transportable carbohydrates to delayed
fatigue
and improved exercise performance. Ratings
of
perceived exertion (RPE) during prolonged exercise
may
be lower with a mixture of glucose and fructose than with glucose
alone and cadence might be better maintained in cyclists [25, 38]
.
It
was
also demonstrated that a glucose : fructose drink could
improve exercise performance [9]
.
Cyclists exercised for 2 hours on
a
cycle ergometer at 54%VO
2max
during which they
ingested
either a carbohydrate drink or placebo and
where
then asked to perform a time trial that lasted
approximately
60 min. When the subjects ingested
a
glucose drink (at 1.8 g/min), they improved their
power
output by 9% (254W versus 231W). However,
when
they ingested glucose : fructose there was an­
other
8% improvement of the power output over and above the improvement by
glucose ingestion (275W
versus
254W). Other studies confirmed the bene­
fits
of glucose: fructose compared with glucose only [37, 44]
.

Performance
benefits have generally be ob­served in studies that are 2.5h or
longer and ef­fects start to become visible in the third hour of
exercise
[25]. When exercise
duration
is shorter, or intakes are below 70 g/h
multiple
transportable carbohydrates may not
have
the same performance benefits [15], but is must be no­
ted
that in these situations the effects are at least
similar
to other carbohydrate sources.

Carbohydrate
during exercise
and
performance: dose response

Very
few well controlled dose-response stu­dies on carbohydrate
ingestion during exercise
and
exercise performance have been published.
Most
of the older studies had serious methodologi­
cal
issues that made it difficult to establish a true
dose
response relationship between the amount
of
carbohydrate ingested and performance. Until
a
few years ago the conclusion seemed to be that you needed a minimum
amount of carbohydrate (probably about 20 grams per hour based on one
study)
but it was generally assumed that there was no dose response
relationship [36]
.
Good dose-response studies, however, were
noticeably
absent at that time.

More
recently, however, evidence has been
accumulating
for a dose response relationship
between
carbohydrate ingestion rates, exogenous
carbohydrate
oxidation rates and performance. In one recent carefully conducted
study, endurance
performance
and fuel selection was measured
during
prolonged exercise while ingesting glucose
(15,
30, and 60 g/h) [42]
.
Twelve subjects cycled for 2-h at
77% VO2
peak followed by a 20-km time trial. The results suggest a
relationship between the dose of
glucose
ingested and improvements in endurance
performance.
The exogenous glucose oxidation in­
creased
with ingestion rate and it is possible that
an
increase in exogenous carbohydrate oxidation is
directly
linked with, or responsible for, exercise per­
formance.

A
large scale multicentre study by Smith, Zach­
wieja,
Horswill et al. [41] also investigated the re­
lationship
between carbohydrate ingestion rate and cycling time trial
performance to identify a range of
carbohydrate
ingestion rates that would enhance
performance.
In their study, across 4 research
sites,
51 cyclists and triathletes completed four
exercise
sessions consisting of a 2-hour constant
load
ride at a moderate to high intensity. Twelve dif­
ferent
beverages (consisting of glucose : fructose in a 2:1 ratio)
were compared, providing participants
with
12 different carbohydrate doses raging from 10 to 120 g
carbohydrate/h during the constant
load
ride. The carbohydrates used were multiple
transportable
carbohydrates (glucose : fructose). At
all
four sites, a common placebo that was artifi­
cially
sweetened, colored, and flavored and did not
contain
carbohydrate was provided. The order of
the
beverage treatments was randomized at each
site
(3 at each site). Immediately following the cons­
tant
load ride, participants completed a computer simulated 20-km time
trial as quickly as possible.
The
ingestion of carbohydrate significantly im­
proved
performance in a dose dependent manner
and
the authors concluded that the greatest per­
formance
enhancement was seen at an ingestion
rate
between 60-80 g carbohydrate/h. Interesting­ly, these results are
in line with an optimal carbo­
hydrate
intake proposed by a recent meta-analysis [48]
.

Based
on the studies mentioned above carbohy­
drate
intake recommendation for more prolonged
exercise
can be formulated and are listed in newly
proposed
guidelines in
Figure
1.

Training status

A
question that often arises is whether the re­
sults
of these studies (often conducted in trained or
even
very well trained individuals) may translate to less trained or
untrained individuals. A few studies
compared
a group of trained individuals with un­
trained.
No differences were found in exogenous car­
bohydrate
oxidation between trained and untrained [24, 47].

It
is possible that there is an absolute exercise
intensity
below which exogenous oxidation rates
are
lower and this may be more important than the
training
status of the athlete. It is unlikely that the
runner
who completes the marathon in 5 h would
need
an intake of 90 carbohydrate per hour as this
would
be close to, or could even exceed, the total car­
bohydrate
use, at that absolute exercise intensity.

Effect
of
body weight

The
guidelines for carbohydrate intake during
exercise,
presented here, are expressed in grams
per
hour of exercise and that these figures are not
corrected
for body mass. In the most recent posi­
tion
statement by the American Dietetics Associa­
tion
(ADA) and ACSM [36], advice
with
respect to carbohydrate intake during exercise
is
expressed in g/kg. The rationale for this was un­
clear
as there appears to be no correlation between body mass and exogenous
carbohydrate oxidation [19]. The reason, for this lack of
cor­
relation
between body weight and exogenous carbo­
hydrate
oxidation, is probably that the limiting factor
is
carbohydrate absorption and absorption is largely independent of body
mass. It is likely, however, that
the
absorptive capacity of the intestine is modified
by
carbohydrate content of the diet as it has been
shown
in animal studies that intestinal transporters
can
be upregulated with increased carbohydrate in­
take.
Since exogenous carbohydrate is independent of body mass or muscle
mass, but dependent on ab­
sorption
and to some degree the absolute exercise
intensity
(at very low absolute intensities, low carbo­hydrate rates may
also restrict exogenous carbohy­
drate
oxidation), the advice given to athletes should
be
in absolute amounts. These results clearly show
that
there is no rationale for expressing carbohy­drate
recommendations for athletes per kilogram
body
mass
(Figure
1).

In
summary, individual differences in exoge­
nous
carbohydrate oxidation exist, although they
are
generally small. These differences are not re­
lated
to body mass but more likely to a capacity
to
absorb carbohydrates. This in turn could be diet
related.

Training the gut

Since
the absorption of carbohydrate limits exo­
genous
carbohydrate oxidation, and exogenous carbohydrate oxidation seems to
be linked with
exercise
performance, an obvious potential strategy
would
be to increase the absorptive capacity of the
gut.
Anecdotal evidence in athletes would suggest
that
the gut is trainable and that individuals who
regularly
consume carbohydrate or have a high dai­
ly
carbohydrate intake may also have an increased capacity to absorb it.
Intestinal carbohydrate trans­porters can indeed be upregulated
by exposing an animal to a high carbohydrate diet [11]. To date there
is limited evidence in humans. A re­
cent
study by Cox et al. [6] investigated whether
altering
daily carbohydrate intake affects substrate
oxidation
and in particular exogenous carbohydrate oxidation. It was
demonstrated that exogenous car­bohydrate oxidation rates were
higher after the high
carbohydrate
diet (6.5 g/kg bodyweight/day; 1.5 g/
kg
BW provided mainly as a carbohydrate supple­
ment
during training) for 28 days compared with a
control
diet (5 g/kg bodyweight/day). This study pro­vided evidence that
the gut is indeed adaptable and
this
can be used as a practical method to increase
exogenous
carbohydrate oxidation. We recently sug­
gested
that this may be highly relevant to the endu­rance athlete and
may be a prerequisite for the first
person
to break the 2h marathon barrier [43]
.
Although more research is needed, it is recommended to practice the
carbo­
hydrate
intake strategy in training, and dedicate at
least
some training to training with a relatively high
carbohydrate
intake.

Carbohydrate
intake
in
real life events

Relatively
few studies have investigated how
much
carbohydrate athletes ingest during races and whether they meet the
guidelines. In a study
by
Kimber, Ross, Mason and Speedy [26] the
average
carbohydrate intake during an Ironman
distance
triathlon was 1.0 g/kg BW/h in female
triathletes
and 1.1 g/kg BW/h in male triathletes.
They
achieved these carbohydrate intakes by in­
gesting
very large amounts of carbohydrate during
cycling
(approximately 1.5 g/kg BW/h). Most of
the
intake occurred during the cycling leg where
intake
was almost 3 times as high as during
running
leg. In male athletes carbohydrate intake
was
positively
correlated with finish time but this
relationship
could not be confirmed in females.
A
large study of endurance events by Pfeiffer et
al.
[32], demonstrated wide variation in carbo­hydrate intake
reported by athletes between and within events, with highest intakes
in cycling and triathlon events and lowest in marathons. In this
study
it was also found that in Ironman races car­
bohydrate
intake was related to finish time with
greater
carbohydrate intake correlating to bet­
ter
performance. These findings appear to be in
agreement
with the recent dose response studies
by
Smith, Pascoe et al. [40] and Smith, Zach
wieja
et al. [41, 42].

Different
advice for different
endurance
sports

With
carbohydrate feeding during cycling is it
has
repeatedly been shown that muscle glycogen breakdown is unaffected.
During running, however, there are suggestions that muscle glycogen
break­
down
is reduced in particular in type I muscle fibres [45]
.
Therefore
carbohydrate feeding results in improved
performance
in cycling and running, although the
mechanism
by which this occurs may not necessa­rily be the same. This issue
is discussed in more de­tail in an excellent review by Tsintzas
and Williams [45]. Exogenous carbohydrate oxidation appears
to
be similar in cycling and running [33]

sug­
gesting
that the advice for cyclists and runners is not
different.

Intermittent and skill
sports

The
vast majority of studies has been per­
formed
with endurance athletes performing con­
tinuous
exercise. Most team sports have a high­ly intermittent nature
with bursts of very high
intensity
exercise followed by relatively low inten­
sity
recovery periods. Besides this, performance in
these
sports is often dependent on other factors

than
maintenance of speed or power and factors
like
agility, timing, motor skill, decision making,
jumping,
and sprinting may all play a role. Never­
theless,
carbohydrate ingestion during exercise
has
also been shown to enhance endurance ca­pacity in intermittent
activities. A large number of
studies
have demonstrated that if carbohydrate is ingested during
intermittent running, fatigue
can
be delayed and time to exhaustion can be in­
creased
[10, 13, 29-31]
.

More
recently, studies have incorporated mea­surements of skill into
their performance measure­
ments.
Currell, Conway and Jeukendrup [8] de­
veloped
a 90 min soccer simulation protocol that included measurements of
skill, such as agility,
dribbling,
shooting and heading. The soccer pla­
yers
performed 90 min of intermittent exercise that mimicked their
movement patterns during a game.
During
the 90 min, skill performance measurements
were
performed at regular intervals. Agility, drib­bling and accuracy
of shooting were all improved
but
heading was not affected with carbohydrate in­
gestion.
Other studies have found similar effects [1]
.
Although
typically
a number of the skills measured in these studies were improved with
carbohydrate feeding,
the
mechanisms behind these improvements are
unknown
and have not been studied in any detail.

It
appears that carbohydrate intake during team
sports
and other sports with an element of skill has the potential to
improve not only fatigue resistance but also the skill components of
a sport, especially
towards
the end of a game. The practical challenge
is
often to find ways to ingest carbohydrate during a
game
within the rules of the sport.

Summary

In
summary, there have been significant changes
in
the understanding of the role of carbohydrate du­
ring
exercise in recent years and this allows for more
specific
and more individualised advice with regards to carbohydrate ingestion
during exercise. The new
guidelines
proposed take into account the dura­
tion
(and intensity) of exercise and advice is not res­
tricted
to the amount of carbohydrate, it also gives direction with respect
to the type of carbohydrate.
The
recommendations presented here are derived
mostly
from studies with trained and well-trained ath­
letes.
Athletes who perform at absolute intensities
that
are lower will have lower carbohydrate oxidation rates and the
amounts presented here should be ad­justed (downwards)
accordingly. The recommended
carbohydrate
intake can be achieved by consuming drinks, gels of low fat, low
protein and low fibre solid foods (bars) and selection should be
determined by
personal
preference. Athletes can adopt a mix and match strategy to achieve
their carbohydrate intake
goals.
However, the carbohydrate intake should be
balanced
with a fluid intake plan and it must be noted
that
solid foods and highly concentrated carbohydrate solutions have been
shown to reduce fluid absorption.
Although,
a slowing of gastric emptying and absorp­tion can partly be
prevented by using multiple trans­
portable
carbohydrates, this is something the athlete
needs
to consider when developing their nutrition
strategy.
Although more research is needed, it is high­
ly
recommended to train the nutrition strategy to re­
duce
the chances of gastro-intestinal discomfort and
to
increase the absorptive capacity of the intestine.

Finally
it must be noted that most studies
are
based on findings in runners and cyclist and
more
work is needed to establish the effects
and
underlying mechanisms of carbohydrate in­
gestion
on skill components in intermittent team
sports.

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