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Related Experiment Video

Updated: Feb 15, 2026

Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test

Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test

Published on: July 27, 2015

Gender- and Muscle-Specific Responses During Fatiguing Exercise.

Ethan C Hill¹, Terry J Housh, Cory M Smith

¹Human Performance Laboratory, Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska.

Journal of Strength and Conditioning Research

|January 16, 2018

Summary

Men and women exhibit distinct muscle fatigue responses. Electromyography and mechanomyography reveal gender-specific neuromuscular adaptations in forearm flexor muscles during fatiguing exercise.

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Published on: October 17, 2018

Area of Science:

Exercise Physiology
Neuromuscular Physiology
Sports Science

Background:

Understanding gender differences in muscle fatigue is crucial for optimizing training and rehabilitation.
Electromyography (EMG) and mechanomyography (MMG) are valuable tools for assessing neuromuscular function during exercise.

Purpose of the Study:

To investigate gender-specific differences in EMG and MMG responses during fatiguing forearm flexion contractions.
To compare neuromuscular adaptations between men and women under submaximal, isokinetic conditions.

Main Methods:

Twelve men and 12 women completed fatiguing isokinetic forearm flexion exercise.
Surface EMG and MMG signals were recorded from biceps brachii and brachioradialis.
Concentric peak torque was measured pre- and post-fatigue.

Main Results:

Both genders showed increased EMG amplitude and decreased EMG mean power frequency.
MMG amplitude and mean power frequency exhibited muscle- and gender-specific changes.
Men experienced a greater decline in peak torque, potentially due to blood flow occlusion.

Conclusions:

Neuromuscular fatigue responses during forearm flexion differ between genders and specific muscles.
Biceps brachii showed greater fatigue in men, while brachioradialis showed greater fatigue in women.
Gender differences in synergistic muscle recruitment may influence fatigue patterns.