Pflügers Archiv

, Volume 447, Issue 6, pp 875–883 | Cite as

Training effect on performance, substrate balance and blood lactate concentration at maximal lactate steady state in master endurance-runners

  • Veronique Billat
  • Pascal Sirvent
  • Pierre-Marie Lepretre
  • Jean Pierre Koralsztein
Exercise, Temperature Regulation

Abstract

Training effects on time-to-exhaustion, substrate and blood lactate balances at the maximal lactate steady state velocity (MLSSv) were examined. Eleven male, veteran, long-distance runners performed three tests before and after 6 weeks of training at MLSSv: an incremental test to determine maximum O2 uptake (O2,max) and the velocity at the lactate threshold (vLT), a sub-maximal test of two stages of 20 min at 95 and 105% of vLT separated by 40 min rest to determine the MLSSv and the corresponding lactate concentration (MLSSc) and a time-to-exhaustion run at MLSSv for which the substrate balance was calculated. Duration and distance run at MLSSv increased dramatically respectively from 44±10 to 63±12 min and from 10.4 to 15.7 km respectively (P<0.01). MLSSv increased significantly with training but the relative fraction ofO2,max remained the same (85.2±4.5 vs. 85.3±5.2%, P=0.93). MLSSc was unaffected by training as determined from the percentage of energy yielded by carbohydrates (80%) during the exhaustive run at MLSSv. These findings show that training at MLSS elicits small increases in MLSSv andO2,max, but enhances time-to-exhaustion (endurance) at MLSSv substantially (+50%). Training does not change the proportion of carbohydrate oxidized, which is the major substrate used during an exhaustive run at MLSS lasting 1 h.

Keywords

Blood lactate Running Training Carbohydrates Exercise Cross-over point 

Notes

Acknowledgements

This study was supported by grants from the Fondation d’Entreprise Gaz de France.

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Copyright information

© Springer-Verlag  2004

Authors and Affiliations

  • Veronique Billat
    • 1
    • 2
  • Pascal Sirvent
    • 3
  • Pierre-Marie Lepretre
    • 2
  • Jean Pierre Koralsztein
    • 1
  1. 1.Centre de Médecine du Sport CCAS ParisFrance
  2. 2.Unité de Formation et de Recherche Fondamentale et Appliquée, Laboratoire des Interactions Gène et EntraînementUniversité d’Evry-Val d’EssonneEvry CedexFrance
  3. 3.Service des Explorations fonctionnelles et respiratoiresHôpital Arnaud de VilleneuveMontpellier Cedex 5France

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