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Effects of spontaneously chosen crank rate variations on electromyographic responses in sub-maximal arm exercise in inexperienced subjects.

Abstract：

:The aim of the present study was to compare electromyographic responses during arm exercises with a crank rate chosen spontaneously ( T(S)) or set at 20% below or above ( T(-20), T(+20)) the spontaneously chosen crank rate (SCCR). Ten male physical education students performed arm exercises with intensities ranging from 20% to 80% of maximal power. Muscular activity levels were analysed for the biceps brachii and the triceps brachii muscles using integrated rectified surface electromyography (iEMG). All values were presented as the mean and standard deviation. During T(S), the sum of iEMG for the two muscles studied was significantly ( P<0.05) lower than during T(+20) for each power output. No significant differences were observed in iEMG values between T(S) and T(-20). The hypothesis that SCCR relates to a minimisation of muscle activation during an upper body exercise was not confirmed. Variations superior or inferior to a 20% increase of the iEMG responses do not influence it. Moreover, the selection of crank rates depends on the power output and the SCCR increased significantly ( P<0.05) with increasing power output.

journal_name

Eur J Appl Physiol

journal_title

European journal of applied physiology

authors

Marais G,Dupont L,Vanvelcenaher J,Clarys JP,Pelayo P

doi

10.1007/s00421-004-1187-1

keywords:

subject

Has Abstract

pub_date

2004-08-01 00:00:00

pages

598-601

issue

4-5

eissn

1439-6319

issn

1439-6327

journal_volume

92

pub_type

临床试验,杂志文章

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