Int J Sports Med 2006; 27(1): 60-66
DOI: 10.1055/s-2005-837507
Training & Testing

© Georg Thieme Verlag KG Stuttgart · New York

Effects of Training on Lactate Kinetics Parameters and their Influence on Short High-Intensity Exercise Performance

L. Messonnier1 , H. Freund2 , C. Denis3 , L. Féasson3 , J.-R. Lacour4
  • 1Laboratory of Modelling Physical Activities, Department STAPS, University of Savoie, Le Bourget du Lac Cedex, France
  • 2Laboratory of Pharmacology and Physico-Chemistry of Cellular and Molecular Interactions, Faculty of Pharmacology - UMR CNRS 7034, Illkirch Cedex, France
  • 3Laboratory of Physiology, EA 3062 - PPEH Unit, Faculty of Medicine, University Jean Monnet, Saint-Etienne Cedex 2, France
  • 4Laboratory of Exercise Physiology - LBMH, Faculty of Medicine Lyon-Sud, Oullins Cedex, France
Further Information

Publication History

Accepted after revision: November 15, 2004

Publication Date:
09 May 2005 (online)

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Abstract

The purpose of the present study was to relate the training-induced alterations in lactate kinetics parameters to the concomitant changes in time to exhaustion (Tlim) at a work rate corresponding to maximal oxygen uptake (Papeak). Eight subjects performed before and after training i) an incremental exercise up to exhaustion to determine Papeak, ii) a 5-min 90 % Papeak exercise followed by a 90-min passive recovery to determine an individual blood lactate recovery curve fitted to the bi-exponential time function: La(t) = La(0) + A1(1 - e-γ1 · t) + A2(1 - e-γ2 · t), and iii) a time to exhaustion at Papeak to determine Tlim. A biopsy of the vastus lateralis muscle was made before and after training. The training programme consisted in pedalling on a cycle ergometer 2 h a day, 6 days a week, for 4 weeks. Training-induced increases (p < 0.05) in Papeak, muscle capillary density, citrate synthase activity, γ2 that denotes the lactate removal ability (from 0.0547 ± 0.0038 to 0.0822 ± 0.0071 min-1) and Tlim (from 299 ± 23 to 486 ± 63 s), decreases (p < 0.05) in activities of lactate dehydrogenase (LDH) and muscle type of LDH, the phosphofructokinase/citrate synthase activities ratio and the estimated net amount of lactate released (NALR) during exercise recovery (from 66.5 ± 8.6 to 47.2 ± 11.1 mmol) were also observed. The improvement of Tlim with training was related to the increase in γ2 (r = 0.74, p = 0.0367) and to the decrease in NALR (r = 0.77, p = 0.0250). These results suggest that the post-training greater ability to remove lactate from the organism and reduced muscle lactate accumulation during exercise account for the concomitant improvement of the time to exhaustion during high-intensity exercise performed at the same relative work rate.

References

L. Messonnier

Laboratory of Modelling Physical Activities, Department STAPS, University of Savoie

Campus universitaire

73376 Le Bourget du Lac Cedex

France

Phone: + 33479758147

Fax: + 33 4 79 75 81 48

Email: laurent.messonnier@univ-savoie.fr