Effects of self-regulatory strength depletion on muscular performance and EMG activation

被引：119

作者：

Bray, Steven R. ^{[1
]}

Ginis, Kathleen A. Martin ^{[1
]}

Hicks, Audrey L. ^{[1
]}

Woodgate, Jennifer ^{[1
]}

机构：

[1] McMaster Univ, Dept Kinesiol, Hamilton, ON L8S 4K1, Canada

来源：

PSYCHOPHYSIOLOGY | 2008年 / 45卷 / 02期

关键词：

isometric exercise; self-control; willpower; central fatigue hypothesis;

D O I：

10.1111/j.1469-8986.2007.00625.x

中图分类号：

B84 [心理学];

学科分类号：

04 ; 0402 ;

摘要：

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.

引用

页码：337 / 343

页数：7

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