Effects of self‐regulatory strength depletion on muscular performance and EMG activation
- 8 November 2007
- journal article
- research article
- Published by Wiley in Psychophysiology
- Vol. 45 (2), 337-343
- https://doi.org/10.1111/j.1469-8986.2007.00625.x
Abstract
The purpose of the present study was to examine the effects of a self-regulatory strength depletion manipulation on performance of a physical endurance (isometric handgrip) task. In addition, the effect of depletion on EMG activity in the working forearm muscles during the endurance task was explored. Sedentary undergraduates (N=49) were randomly assigned to either a cognitive depletion condition (modified Stroop task) or a control (color word) group and completed two maximal isometric exercise endurance trials separated by the cognitive task. Participants in the depletion group showed significant (p<.05) degradations in performance and exhibited higher EMG activation on the second endurance trial (p<.05) compared to controls. Results are consistent with the limited strength model of self-regulation and are interpreted in light of the central fatigue hypothesis.Keywords
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