The face of effort: frowning muscle activity reflects effort during a physical task.

de Morree, HM and Marcora, Samuele Maria (2010) The face of effort: frowning muscle activity reflects effort during a physical task. Biological Psychology, 85 (3). pp. 377-382. ISSN 0301-0511. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1016/j.biopsycho.2010.08.009

Abstract

It is a common observation that exertion of effort is associated with a specific facial expression. However, this facial expression has never been quantified during physical tasks and its relationship with effort is unknown. The aims of the present study were to measure frowning muscle activity during a physical task with electromyography (EMG) and to investigate the relationship between facial EMG and effort. Effort was experimentally manipulated by increasing task difficulty and inducing muscle weakness. Twenty men performed leg extensions with four relative workloads. The fatigue group (n=10) repeated the leg extensions after fatiguing eccentric exercise, and the control group repeated just the leg extensions. Facial EMG amplitude, ratings of perceived effort (RPE), and leg EMG amplitude increased significantly with increasing task difficulty and with muscle fatigue. Facial EMG, RPE, and leg EMG all correlated significantly. The results suggest that frowning muscle activity reflects effort during physical tasks.

Item Type: Article
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Q Science > QP Physiology (Living systems)
B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculties > Social Sciences > School of Sport and Exercise Studies
Depositing User: Samuele Marcora
Date Deposited: 21 Jan 2011 10:29
Last Modified: 18 Nov 2011 10:37
Resource URI: http://kar.kent.ac.uk/id/eprint/26250 (The current URI for this page, for reference purposes)
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