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Related Experiment Video

Updated: Jul 17, 2026

Measuring the Motor Aspect of Cancer-Related Fatigue using a Handheld Dynamometer

Measuring the Motor Aspect of Cancer-Related Fatigue using a Handheld Dynamometer

Published on: February 20, 2020

Fatigue effects on tracking performance and muscle activity.

M A Huysmans¹, M J M Hoozemans, A J van der Beek

¹Institute for Fundamental and Clinical Human Movement Sciences, Faculty of Human Movement Sciences, Vrije Universiteit Amsterdam, Van der Boechorststraat 9, 1081 BT Amsterdam, The Netherlands. m.huysmans@fbw.vu.nl

Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology

|January 9, 2007

Summary

Fatigue impairs tracking performance and movement accuracy. However, individuals selectively increase peak muscle activity in the extensor carpi radialis to maintain task performance when fatigued.

Related Experiment Videos

Last Updated: Jul 17, 2026

Measuring the Motor Aspect of Cancer-Related Fatigue using a Handheld Dynamometer

Measuring the Motor Aspect of Cancer-Related Fatigue using a Handheld Dynamometer

Published on: February 20, 2020

Area of Science:

Neuroscience
Human Movement Science
Ergonomics

Background:

Fatigue is known to affect proprioception and movement accuracy.
Increased muscle activity may potentially counteract fatigue-induced performance decrements.

Purpose of the Study:

To investigate the impact of fatigue on tracking performance.
To examine the effects of fatigue on muscle activity in the M. extensor carpi radialis (ECR).

Main Methods:

11 female participants completed a 2-minute computer mouse tracking task.
Tasks were performed before and after a fatiguing wrist extension protocol.
Tracking performance and electromyography (EMG) of the ECR were measured.

Main Results:

Fatigue significantly impaired tracking performance, indicated by lower percentage time on target and increased distance to target.
While overall muscle activity remained unchanged, peak EMG amplitudes in the ECR were elevated post-fatigue.
Static and median EMG levels in the ECR were not affected by fatigue.

Conclusions:

Individuals modify their tracking performance when fatigued to meet task demands.
Fatigue leads to a selective increase in peak ECR muscle activity rather than generalized muscle exertion.