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Related Experiment Videos

Pre-exercise serum cortisol concentration and responses to laboratory exercise

R Stupnicki1, Z Obmiński, A Klusiewicz

  • 1Department of Physiology, Institute of Sport, Warsaw, Poland.

European Journal of Applied Physiology and Occupational Physiology
|January 1, 1995
PubMed
Summary

Pre-exercise cortisol levels may influence anaerobic metabolism during exercise. This study found a link between higher pre-exercise cortisol and increased blood lactate in male athletes, suggesting a conditioning effect on energy systems.

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Area of Science:

  • Exercise Physiology
  • Endocrinology

Background:

  • Cortisol, a stress hormone, plays a role in energy metabolism.
  • Understanding hormonal influences on athletic performance is crucial for training optimization.

Purpose of the Study:

  • To investigate the relationship between pre- and post-exercise cortisol levels and various physiological markers.
  • To determine if cortisol influences anaerobic-glycolytic metabolism during strenuous exercise.

Main Methods:

  • Studied 74 male and 40 female athletes (wrestlers, senior and junior rowers).
  • Monitored blood lactate, pH, oxygen uptake, heart rate, and power output during graded exercise.
  • Measured pre- and post-exercise serum cortisol concentrations.

Main Results:

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  • Senior rowers exhibited higher resting cortisol than junior athletes.
  • A significant positive correlation was observed between postexercise lactate and pre-exercise cortisol in all male groups (r = 0.515, P < 0.001).
  • No significant correlation was found between these variables in female athletes (r = 0.162).

Conclusions:

  • Pre-exercise cortisol concentrations may condition anaerobic-glycolytic metabolism.
  • Hormonal factors, like cortisol, appear to have a sex-specific influence on exercise metabolism.