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Related Experiment Videos

Blood lactate increase during the force velocity exercise test.

J Mercier1, B Mercier, C Prefaut

  • 1Service d'Exploration de la Fonction Respiratoire, Hôpital Aiguelongue, Montpellier, France.

International Journal of Sports Medicine
|February 1, 1991
PubMed
Summary

The force velocity exercise test recruits lactic anaerobic metabolism, indicating that maximal power is both alactic and lactic anaerobic. Lactate accumulation may limit maximal anaerobic power output.

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Area of Science:

  • Sports Science
  • Exercise Physiology
  • Biochemistry

Background:

  • The force velocity exercise test is commonly used to assess maximal power.
  • Its reliance on anaerobic metabolism, specifically lactic pathways, requires further investigation.

Purpose of the Study:

  • To determine if the force velocity test is strictly alactic or involves lactic anaerobic metabolism.
  • To investigate the relationship between power output and blood lactate accumulation during this test.

Main Methods:

  • Venous blood lactate levels were measured in nine trained males during a force velocity test.
  • Blood samples were collected at rest, after each sprint (S1), and during recovery (S2) across varying loads (1-10 kg).

Main Results:

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  • Venous blood lactate concentration significantly increased during the force velocity test.
  • Lactate increase per load (delta[LA]) decreased significantly as exercise progressed.
  • A significant positive correlation was found between peak power and blood lactate levels during recovery.

Conclusions:

  • The force velocity test recruits lactic anaerobic metabolism, challenging its purely alactic nature.
  • Maximal power assessed by this test should be considered a combination of alactic and lactic anaerobic contributions.
  • Lactate accumulation may be a limiting factor for maximal anaerobic power in this test.