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DOI: 10.1055/s-2003-38201
Differences in Lactate Exchange and Removal Abilities in Athletes Specialised in Different Track Running Events (100 to 1500 m)
Publication History
Accepted after revision: July 25, 2002
Publication Date:
01 April 2003 (online)
Abstract
The purpose of this study was to investigate whether track running
specialisation could be associated with differences in the ability to exchange
and remove lactate. Thirty-four male high-level runners were divided into two
groups according to their speciality
(100 - 400 m/800 - 1500 m).
All performed a 1-min 25.2 km × h-1
event, followed by a 90-min passive recovery to obtain individual blood lactate
recovery curves which were fitted to a bi-exponential time function:
[La](t) = [La](0) + A1(1-e-γ1t)
+ A2(1-e-γ2t).
The velocity constant γ1 which denotes the ability
to exchange lactate between the previously worked muscles and blood was higher
(p < 0.001) in middle-distance runners than in sprint runners.
The velocity constant γ2 which reflects the overall ability to
remove lactate did not differ significantly between the two groups.
γ1 was positively correlated with the best performance over
800 m achieved by 16 athletes during the outdoor track season following
the protocol (r = 0.55, p < 0.05). In
conclusion, the lactate exchange ability seems to play a role on the
athlete's capacity to sustain exercise close to 2-min-duration and
specifically to run 800 m.
Key words
Male athletes - sprint runners - middle-distance runners - bicompartmental model
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C. Bret
Laboratoire de Physiologie de l'Exercice · GIP
Exercice · Faculté de Médecine Lyon Sud
Chemin du petit Revoyet BP 12 · 69 921 Oullins Cedex
· France ·
Phone: (33) 4-78-86-31-35
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Email: cbret@univ-lyon1.fr