Journal of Applied Physiology, Vol 55, Issue 2 365-367, Copyright © 1983 by American Physiological Society

ARTICLES

Lactate in human skeletal muscle after 10 and 30 s of supramaximal exercise

I. Jacobs, P. A. Tesch, O. Bar-Or, J. Karlsson and R. Dotan

The purpose of this study was to evaluate the extent of anaerobic glycogenolysis, as indicated by intramuscular lactate concentration, after 10 and 30 s of supramaximal exercise and to compare male and female subjects in this regard. Fifteen males and seven females performed two cycle exercise bouts against a resistance which was standardized so that one pedal revolution resulted in 4.90 J work X kg body wt-1. A muscle biopsy was obtained after 10- and 30-s exercise bouts and analyzed for lactate concentration. The lactate concentrations averaged 36 and 61 mmol X kg dry wt-1 after the 10- and 30-s exercise bouts, respectively. The male subjects had higher (P less than 0.005) lactate concentrations and generated higher (P less than 0.001) power outputs for both exercise bouts. When the mean lactate concentrations were statistically adjusted after controlling for between-group variation in power output, no difference was evident between groups for the 10- or the 30-s lactate value. The results are evidence that pronounced lactate accumulation occurs during supramaximal exercise of a 10-s duration, suggesting that glycolysis can occur within this time frame. This is in contrast to the theory that glycolysis does not occur until endogenous phosphagen levels reach some critically low value, not thought to be obtainable within the first 10 s of supramaximal exercise.

This article has been cited by other articles:

				B. Walsh, C. M. Stary, R. A. Howlett, K. M. Kelley, and M. C. Hogan Glycolytic activation at the onset of contractions in isolated Xenopus laevis single myofibres Exp Physiol, September 1, 2008; 93(9): 1076 - 1084. [Abstract] [Full Text] [PDF]

				R. Beneke, M. Hutler, M. Jung, and R. M. Leithauser Modeling the blood lactate kinetics at maximal short-term exercise conditions in children, adolescents, and adults J Appl Physiol, August 1, 2005; 99(2): 499 - 504. [Abstract] [Full Text] [PDF]

				F. Billaut, M. Giacomoni, and G. Falgairette Maximal intermittent cycling exercise: effects of recovery duration and gender J Appl Physiol, October 1, 2003; 95(4): 1632 - 1637. [Abstract] [Full Text] [PDF]

				J. A. L. Calbet, J. A. De Paz, N. Garatachea, S. Cabeza de Vaca, and J. Chavarren Anaerobic energy provision does not limit Wingate exercise performance in endurance-trained cyclists J Appl Physiol, February 1, 2003; 94(2): 668 - 676. [Abstract] [Full Text] [PDF]

				M. Esbjornsson-Liljedahl, K. Bodin, and E. Jansson Smaller muscle ATP reduction in women than in men by repeated bouts of sprint exercise J Appl Physiol, September 1, 2002; 93(3): 1075 - 1083. [Abstract] [Full Text] [PDF]

				C. Groussard, I. Morel, M. Chevanne, M. Monnier, J. Cillard, and A. Delamarche Free radical scavenging and antioxidant effects of lactate ion: an in vitro study J Appl Physiol, July 1, 2000; 89(1): 169 - 175. [Abstract] [Full Text] [PDF]

				R. A. Howlett, G. J. F. Heigenhauser, and L. L. Spriet Skeletal muscle metabolism during high-intensity sprint exercise is unaffected by dichloroacetate or acetate infusion J Appl Physiol, November 1, 1999; 87(5): 1747 - 1751. [Abstract] [Full Text] [PDF]

				M. Esbjornsson-Liljedahl, C. J. Sundberg, B. Norman, and E. Jansson Metabolic response in type I and type II muscle fibers during a 30-s cycle sprint in men and women J Appl Physiol, October 1, 1999; 87(4): 1326 - 1332. [Abstract] [Full Text] [PDF]