Low carbohydrate diet affects the oxygen uptake on-kinetics and rating of perceived exertion in high intensity exercise

Low carbohydrate diet affects the oxygen uptake on-kinetics and rating of perceived exertion in high intensity exercise

Author Lima-Silva, Adriano E. Google Scholar
Pires, Flavio O. Google Scholar
Bertuzzi, Romulo C. M. Google Scholar
Lira, Fabio S. Autor UNIFESP Google Scholar
Casarini, Dulce Autor UNIFESP Google Scholar
Kiss, Maria Augusta P. D. M. Google Scholar
Institution Univ Fed Alagoas
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Abstract The aim of this study was to determine if the carbohydrate (CHO) availability alters the rate of increase in the rating of perceived exertion (RPE) during high intensity exercise and whether this would be associated with physiological changes. Six males performed high intensity exercise after 48 h of controlled, high CHO (80%) and low CHO (10%) diets. Time to exhaustion was lower in the low compared to high CHO diet. the rate of increase in RPE was greater and the VO(2) slow component was lower in the low CHO diet than in the control. There was no significant condition effect for cortisol, insulin, pH, plasma glucose, potassium, or lactate concentrations. Multiple linear regression indicated that the total amplitude of VO(2) and perceived muscle strain accounted for the greatest variance in the rate of increase in RPE. These results suggest that cardiorespiratory variables and muscle strain are important afferent signals from the periphery for the RPE calculations.
Keywords Perceived exertion
Fatigue
Afferent signals
Cardiorespiratory and metabolic systems
Language English
Sponsor Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 2006-60641-6
Date 2011-02-01
Published in Psychophysiology. Malden: Wiley-Blackwell Publishing, Inc, v. 48, n. 2, p. 277-284, 2011.
ISSN 0048-5772 (Sherpa/Romeo, impact factor)
Publisher Wiley-Blackwell
Extent 277-284
Origin http://dx.doi.org/10.1111/j.1469-8986.2010.01059.x
Access rights Closed access
Type Article
Web of Science ID WOS:000286005100014
URI http://repositorio.unifesp.br/handle/11600/33443

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