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Gender differences in perceived exertion during fatiguing knee extensions.

Danny M Pincivero1, Alan J Coelho, Robert M Campy

  • 1Department of Kinesiology, The University of Toledo, OH 43606, USA. danny.pincivero@utoledo.edu

Medicine and Science in Sports and Exercise
|January 7, 2004
PubMed
Summary

Men have greater knee extensor strength, but fatigue and repetitions to failure are similar between genders. Subtle differences in perceived exertion may exist during fatiguing exercise.

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Area of Science:

  • Exercise Physiology
  • Biomechanics
  • Gender Studies

Background:

  • Understanding gender-based physiological responses to exercise is crucial for tailored training.
  • Knee extensor strength, fatigue resistance, and perceived exertion are key metrics in assessing muscular performance.

Purpose of the Study:

  • To investigate gender disparities in knee extensor strength and fatigue.
  • To analyze differences in perceived exertion during continuous dynamic knee extensor contractions between men and women.

Main Methods:

  • Assessed one-repetition maximum (1RM) for knee extensor strength in 15 men and 15 women.
  • Subjects performed repeated knee extensions to failure at 50% of 1RM, with perceived exertion measured using the CR-10 scale.
  • Standardized perceived exertion data using linear interpolation and power function modeling to analyze trends.

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Main Results:

  • Men exhibited significantly greater absolute and body mass-corrected knee extensor strength compared to women.
  • No significant gender differences were observed in the number of repetitions to failure.
  • Women showed higher power function exponents for perceived exertion, indicating potentially steeper increases over repetitions.

Conclusions:

  • Men possess inherently greater knee extensor strength, but submaximal fatiguing performance is comparable between genders.
  • Model selection significantly influences the standardization of perceived exertion.
  • Subtle gender-specific differences in perceived exertion responses may occur during fatiguing resistance exercise.