Document Detail


The influence of peripheral afferent signals on the rating of perceived exertion and time to exhaustion during exercise at different intensities.
MedLine Citation:
PMID:  21375538     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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 (TT(50%) ), and 25% of the distance from LT2 to maximal power output (TW(25%) ). Lactate, catecholamines, potassium, pH, glucose, V̇O(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 TT(50%) (88%), LT2 (64%), and TW(25%) (77%), but no variable predicted RPE in LT1. RPE (55%), RPE+HR (86%), and RPE+RR (92% and 55%) predicted TE in LT1, TT(50%) , LT2, and TW(25%) , respectively. At intensities from TT(50%) to TW(25%) , variables associated with brain activity seem to explain most of the RPE slope, and RPE (+HR and+RR) seems to predict the TE.
Authors:
Flávio O Pires; Adriano E Lima-Silva; Rômulo Bertuzzi; Dulce H Casarini; Maria Augusta P D M Kiss; Mike I Lambert; Timothy D Noakes
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-4
Journal Detail:
Title:  Psychophysiology     Volume:  -     ISSN:  1540-5958     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0142657     Medline TA:  Psychophysiology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Society for Psychophysiological Research.
Affiliation:
School of Physical Education and Sport, University of São Paulo (USP), São Paulo, Brazil Sports Science Research Group, Federal University of Alagoas (UFAL), Maceió, Brazil Nephrology Division, Hospital of the Kidney and hypertension, Federal University of São Paulo, São Paulo, SP, Brazil MRC/UCT Research Unit for Exercise Science and Sports Medicine and Sports Science Institute of South Africa, University of Cape Town, Newlands 7725, South Africa.
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