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Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective response...

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Related Experiment Video

Updated: Jun 26, 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

Technical issues in quantifying low-frequency fatigue in athletes.

Jonathon R Fowles¹

¹School of Recreation Management and Kinesiology, Acadia University, Wolfville, NS, Canada.

International Journal of Sports Physiology and Performance

|December 31, 2008

Summary

This summary is machine-generated.

This report discusses challenges in assessing neuromuscular fatigue in elite athletes, focusing on low-frequency fatigue (LFF). Future research aims to develop practical field tests for better athlete monitoring and training insights.

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Area of Science:

Sports Science
Exercise Physiology
Neuromuscular Function

Background:

A review highlighted limitations in experimental models for studying neuromuscular fatigue.
Applied sport scientists face challenges in evaluating fatigue in elite athletes.
Low-frequency fatigue (LFF) is a key area of interest for practitioners.

Purpose of the Study:

To address recommendations for fatigue assessment in elite athletes from an applied perspective.
To identify difficulties in assessing fatigue in practical sport settings.
To propose future research directions for fatigue evaluation.

Main Methods:

This report is a technical review based on existing literature and practical experience.
It focuses on the challenges of applying laboratory-based fatigue models to elite athletes.
Specific attention is given to the technical hurdles in developing field tests for LFF.

Main Results:

Assessing neuromuscular fatigue in elite athletes presents significant practical challenges.
Developing reliable field-based tests for low-frequency fatigue is technically demanding.
Current methods may not fully capture the complexities of fatigue in applied settings.

Conclusions:

Further research is needed to develop practical LFF assessment tools for applied sport science.
Improved fatigue monitoring can enhance athlete training and performance.
Bridging the gap between reductionist and applied approaches is crucial for advancing fatigue research.