NDLI: Frowning muscle activity and perception of effort during constant-workload cycling

Content Provider	Springer Nature Link
Author	Morree, Helma M. Marcora, Samuele M.
Copyright Year	2011
Abstract	We have recently demonstrated that electromyogram (EMG) amplitude of the frowning muscles correlates with perception of effort during leg-extension exercise. However, during aerobic exercise the relationship between facial EMG and perception of effort has never been investigated. The aim of the present study was to investigate whether facial EMG reflects perception of effort also during constant-workload cycling. We investigated the effects of exercise duration and exercise intensity on facial EMG of the corrugator supercilii muscles, rating of perceived effort, heart rate, and blood lactate concentration. Twenty recreationally active male and female volunteers performed a constant-workload time to exhaustion test on a cycle ergometer. Participants were randomly allocated to the heavy-intensity [63 ± 3% peak power output (P peak)], or the severe-intensity (80 ± 5% P peak) group. The results show that facial EMG can differentiate between two exercise intensities during constant-workload cycling. The effects of exercise duration are inconclusive. Facial EMG increased over time in the severe-intensity group, but not in the heavy-intensity group. Future studies testing a wider range of exercise intensities are required to establish a correlation between facial EMG and exercise intensity during aerobic exercise, and further investigations are needed to establish why there is a discrepancy between facial EMG and perception of effort during lower-intensity aerobic exercise.
Starting Page	1967
Ending Page	1972
Page Count	6
File Format	PDF
ISSN	14396319
Journal	European Journal of Applied Physiology
Volume Number	112
Issue Number	5
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-08-31
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Perceived exertion Facial electromyography Corrugator supercilii Facial expression Aerobic exercise Sports Medicine Occupational Medicine/Industrial Medicine Human Physiology
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Public Health, Environmental and Occupational Health Sports Science

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