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Gender and contraction mode on perceived exertion.

D M Pincivero1, R R Polen, B N Byrd

  • 1Wilfrid Laurier University, Kinesiology & Physical Education, Waterloo, Canada. dpincivero@wlu.ca

International Journal of Sports Medicine
|February 12, 2010
PubMed
Summary
This summary is machine-generated.

This study found that perceived exertion during elbow flexor contractions differs between sexes and contraction types. Men exhibit a linear perceived exertion response during eccentric exercise, unlike women.

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Area of Science:

  • Exercise Physiology
  • Human Movement Science
  • Biomedical Engineering

Background:

  • Understanding perceived exertion is crucial for exercise prescription and injury prevention.
  • Previous research has explored perceived exertion during various contractions, but sex-based differences in concentric versus eccentric modes require further investigation.

Purpose of the Study:

  • To compare perceived exertion responses during concentric and eccentric elbow flexor contractions in young adult men and women.
  • To analyze the relationship between contraction intensity and perceived exertion across sexes and contraction types.

Main Methods:

  • Thirty healthy young adults (men and women) participated in two sessions involving maximal voluntary contractions (MVC) and sub-maximal (10-90% MVC) concentric and eccentric elbow flexor contractions.
  • Perceived exertion was measured using the Borg Category-Ratio scale (CR-10) following sub-maximal contractions.
  • Power function modeling was used to analyze the relationship between exertion and intensity.

Main Results:

  • Perceived exertion was significantly lower than equivalent values on the CR-10 scale at intensities >= 30% MVC.
  • A three-factor interaction revealed that women reported greater perceived exertion during eccentric contractions compared to concentric contractions at 30-40% MVC, while men showed the opposite pattern.
  • Power function modeling indicated a non-linear increase in perceived exertion for both sexes during concentric contractions. Men demonstrated a linear pattern during eccentric contractions, while women showed a non-linear pattern.

Conclusions:

  • Perceived exertion responses during elbow flexor contractions exhibit sex-specific patterns, particularly during eccentric exercise.
  • The non-linear relationship between perceived exertion and intensity holds true for concentric contractions in both sexes, but men display a linear relationship during eccentric contractions.
  • These findings highlight the importance of considering sex and contraction mode when interpreting perceived exertion during resistance training.