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Overtraining--what do lactate curves tell us?

A E Jeukendrup1, M K Hesselink

  • 1Department of Human Biology, University of Maastricht, The Netherlands.

British Journal of Sports Medicine
|December 1, 1994
PubMed
Summary

Overtraining in athletes can be indicated by decreased maximal lactate levels, not just submaximal ones. Careful assessment of training load, performance, and well-being is crucial for accurate diagnosis and recovery.

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Area of Science:

  • Sports Medicine
  • Exercise Physiology
  • Biochemistry

Background:

  • Submaximal lactate concentrations are often used to assess endurance capacity in athletes.
  • Interpreting lactate curves requires careful consideration of various physiological and psychological factors.

Observation:

  • A national/international level cyclist initially showed improved submaximal lactate concentrations.
  • Two weeks later, maximal lactate levels decreased, alongside performance decline and symptoms like irritability and sleep disturbances.

Findings:

  • The cyclist was diagnosed with overtraining syndrome based on decreased maximal lactate and reported symptoms.
  • Reducing the training load led to gradual performance restoration.

Implications:

  • Accurate diagnosis of overtraining requires evaluating maximal lactate levels, not solely submaximal.
  • Athletes' training capacity, motivation, sleep, and eating habits must be thoroughly assessed.
  • Lactate curve interpretation in sports science necessitates a holistic approach, including maximal efforts.

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