Comparative lactate kinetics after short and prolonged submaximal exercise.
Arterial blood lactate concentrations were determined in two groups of eleven males before, during and after near 2 W.kg body mass-1 bicycle exercise. One group of subjects cycled for 3 min, whereas the second group exercised for 60 min. All the lactate curves during recovery could be fitted to a bi-exponential time function consisting of a rapidly increasing and a slowly decreasing component. This typical evolution pattern indicates that the two-compartment model which has been proposed to represent the movements of lactate after short exercise applies also to recovery from prolonged exercise. Lengthening exercise duration decreased (respectively 10% and 28%) the value of both velocity constants of the fits to the lactate recovery curves, with the difference (28%) being statistically significant for the velocity constant describing the slowly decreasing part of the curves. This result indicates that extending exercise from 3 to 60 min impairs the ability to remove lactate after the exercise.
Freund
H
H
Laboratoire de Pharmacologie Cellulaire et Moléculaire, Université Louis Pasteur Strasbourg, Illkirch-Graffenstaden, France.
Oyono-Enguéllé
S
S
Heitz
A
A
Ott
C
C
Marbach
J
J
Gartner
M
M
Pape
A
A
D000328:Adult; D015444:Exercise / Q000502:physiology*; D006801:Humans; D007773:Lactates / Q000097:blood / Q000493:pharmacokinetics*; D008297:Male; D008657:Metabolic Clearance Rate; D010807:Physical Endurance / Q000502:physiology*; D013997:Time Factors
D007773:Lactates