The influence of peripheral afferent signals on the rating of perceived exertion and time to exhaustion during exercise at different intensities

The influence of peripheral afferent signals on the rating of perceived exertion and time to exhaustion during exercise at different intensities

Author Pires, Flavio O. Google Scholar
Lima-Silva, Adriano Eduardo Google Scholar
Bertuzzi, Romulo Google Scholar
Casarini, Dulce Elena Autor UNIFESP Google Scholar
Kiss, Maria Augusta P. D. M. Google Scholar
Lambert, Mike I. Google Scholar
Noakes, Timothy D. Google Scholar
Institution Universidade de São Paulo (USP)
Fed Univ Alagoas UFAL
Universidade Federal de São Paulo (UNIFESP)
Univ Cape Town
Abstract This study determined which peripheral variables would better predict the rating of perceived exertion (RPE) and time to exhaustion (TE) during exercise at different intensities. Ten men performed exercises at first lactate threshold (LT1), second lactate threshold (LT2), 50% of the distance from LT1 to LT2 (TT50%), and 25% of the distance from LT2 to maximal power output (TW25%). Lactate, catecholamines, potassium, pH, glucose, (V) over dotO(2), VE, HR, respiratory rate (RR) and RPE were measured and plotted against the exercise duration for the slope calculation. Glucose, dopamine, and noradrenaline predicted RPE in TT50% (88%), LT2 (64%), and TW25% (77%), but no variable predicted RPE in LT1. RPE (55%), RPE+HR (86%), and RPE+RR (92% and 55%) predicted TE in LT1, TT50%, LT2, and TW25%, respectively. At intensities from TT50% to TW25%, variables associated with brain activity seem to explain most of the RPE slope, and RPE (+HR and+RR) seems to predict the TE.
Keywords Multiple linear regressive model
Brain activity
Central nervous system
Afferent feedback
Language English
Sponsor Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Discovery Health
Medical Research Council
University of Cape Town
Grant number CAPES: PDEE BEX 1900/08-0
FAPESP: 2006/60641-6
Date 2011-09-01
Published in Psychophysiology. Malden: Wiley-Blackwell, v. 48, n. 9, p. 1284-1290, 2011.
ISSN 0048-5772 (Sherpa/Romeo, impact factor)
Publisher Wiley-Blackwell
Extent 1284-1290
Origin http://dx.doi.org/10.1111/j.1469-8986.2011.01187.x
Access rights Closed access
Type Article
Web of Science ID WOS:000293228800012
URI http://repositorio.unifesp.br/handle/11600/34032

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