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[Overtraining syndrome].

Charles-Yannick Guezennec1

  • 1Institut de Médecine Aérospatiale du Service de Santé des Armées Brétigny sur Orge 91223 BP 73. cyguezennec@aol.com

Bulletin De L'Academie Nationale De Medecine
|January 18, 2005
PubMed
Summary

Overtraining syndrome, from excessive exercise, causes behavioral issues and reduced physical capacity due to hormonal and neuromediator changes. Neuromediator alterations, not just physical fatigue, are key drivers of these behavioral changes in overtraining.

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Area of Science:

  • Exercise Physiology
  • Neuroendocrinology
  • Behavioral Science

Context:

  • Overtraining syndrome (OTS) is a complex condition arising from sustained high physical load.
  • OTS is characterized by decreased exercise capacity and significant behavioral disturbances.
  • The syndrome results from an energy imbalance exacerbated by chronobiological and psychological stressors.

Purpose:

  • To elucidate the physiological and neurobiological underpinnings of overtraining syndrome.
  • To investigate the hormonal and neuromediator alterations associated with OTS.
  • To differentiate the contributions of neuromediator changes versus physical fatigue to behavioral symptoms.

Summary:

  • Enhanced physical load leads to overtraining syndrome, characterized by reduced exercise capacity and behavioral changes.
  • Key contributing factors include energy imbalance, chronobiological stress, and psychological stress, which trigger hormonal shifts.
  • Hormonal changes affect the hypothalamo-pituitary-adrenal axis and gonadal steroids, influencing brain neuromediator activity.
  • Specifically, reduced monoamine and increased serotonin levels are observed, impacting brain function.

Impact:

  • Experimental data suggest that neuromediator changes are more influential in driving behavioral alterations in OTS than physical performance decrements.
  • Understanding these neurobiological mechanisms is crucial for developing targeted interventions for overtraining syndrome.
  • This research highlights the intricate link between physical exertion, neuroendocrine function, and psychological well-being.

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