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Markers of excessive exercise

D C McKenzie1

  • 1School of Human Kinetics and Div. Of Sports Medicine, University of British Columbia, 3055 Westbrook Mall, Vancouver, BC V6T 1Z3.

Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquee
|January 23, 1999
PubMed
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Overtraining affects 65% of long-distance runners, causing fatigue and decreased performance. Mood state assessment is currently the most promising tool for identifying overtraining syndrome in athletes.

Area of Science:

  • Sports Medicine
  • Exercise Physiology
  • Endocrinology

Background:

  • Overtraining syndrome (OTS) is a significant concern for endurance athletes, impacting performance and health.
  • Clinical symptoms are nonspecific, including fatigue, mood changes, increased infections, and injuries.
  • Hypothalamic pituitary axis dysfunction due to chronic stress is the suspected underlying cause.

Purpose of the Study:

  • To review the current understanding of overtraining syndrome in long-distance runners.
  • To explore potential diagnostic markers for overtraining.
  • To identify the most reliable methods for detecting overtraining.

Main Methods:

  • Literature review of studies on overtraining markers in athletes.
  • Analysis of physiological and psychological parameters associated with overtraining.

Related Experiment Videos

  • Evaluation of diagnostic accuracy for proposed markers.

    • Main Results:

    • No single diagnostic biomarker for overtraining exists.
    • Time to volitional fatigue and salivary IgA show potential as markers.
    • Mood state assessment is currently the most promising diagnostic tool.

    Conclusions:

    • Overtraining syndrome presents with varied symptoms and likely involves neuroendocrine dysfunction.
    • Further research is needed to validate plasma glutamine and refine existing markers.
    • Psychological assessments, particularly mood state, offer the most reliable current method for identifying overtraining.