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.
journal_name
Eur J Appl Physioljournal_title
European journal of applied physiologyauthors
de Morree HM,Marcora SMdoi
10.1007/s00421-011-2138-2subject
Has Abstractpub_date
2012-05-01 00:00:00pages
1967-72issue
5eissn
1439-6319issn
1439-6327journal_volume
112pub_type
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