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Related Experiment Video

Updated: May 4, 2026

The Sciatic Nerve Cuffing Model of Neuropathic Pain in Mice

The Sciatic Nerve Cuffing Model of Neuropathic Pain in Mice

Published on: July 16, 2014

Does exercise induce hypoalgesia through conditioned pain modulation?

Laura D Ellingson¹, Kelli F Koltyn, Jee-Seon Kim

¹William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin, USA; Department of Kinesiology, University of Wisconsin-Madison, Madison, Wisconsin, USA.

Psychophysiology

|December 21, 2013

Summary

This summary is machine-generated.

Exercise reduces pain sensitivity, a phenomenon known as exercise-induced hypoalgesia (EIH). This study found that while exercise does reduce pain, conditioned pain modulation is unlikely to be the primary mechanism driving EIH.

Keywords:

Exercise Hypoalgesia Kaatsu Mechanism Modulation Pain

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Area of Science:

Exercise Physiology
Pain Science
Neuroscience

Background:

Exercise-induced hypoalgesia (EIH) is a well-documented phenomenon.
The underlying physiological mechanisms of EIH remain largely undetermined.
Conditioned pain modulation (CPM) is a potential candidate mechanism for EIH.

Purpose of the Study:

To investigate the role of conditioned pain modulation (CPM) in exercise-induced hypoalgesia (EIH).
To compare the hypoalgesic effects of painful versus nonpainful exercise.

Main Methods:

Sixteen women participated in three experimental sessions: painful exercise, nonpainful exercise, and quiet rest.
Pain sensitivity was assessed using noxious heat stimuli, measuring intensity and unpleasantness.
Pain ratings were recorded at baseline, during, and after each session.

Main Results:

Pain sensitivity significantly decreased during both painful and nonpainful exercise sessions compared to rest (p < 0.05).
The magnitude of the hypoalgesic response was greater following painful exercise than nonpainful exercise.
Pain sensitivity did not decrease during the quiet rest condition.

Conclusions:

Exercise demonstrably reduces pain sensitivity, confirming EIH.
Exercise-induced muscle pain may influence the magnitude of EIH.
CPM is unlikely to be the primary mechanism responsible for EIH, as nonpainful exercise also induced hypoalgesia.