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

Autor(es)

Lima-Silva, Adriano E. ^{[1, 2]} ; Pires, Flavio O. ^[1] ; Bertuzzi, Romulo C. M. ^[1] ; Lira, Fabio S. ^[3] ; Casarini, Dulce ^[4] ; Kiss, Maria Augusta P. D. M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Phys Educ & Sport, Sao Paulo - Brazil

^[2] Univ Fed Alagoas, Fac Nutr, Sports Sci Res Grp, BR-7072970 Maceio, Alagoas - Brazil

^[3] Univ Fed Sao Paulo, Div Nutr Physiol, Dept Physiol, Sao Paulo - Brazil

^[4] Univ Fed Sao Paulo, Hosp Kidney & Hypertens, Div Nephrol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PSYCHOPHYSIOLOGY; v. 48, n. 2, p. 277-284, FEB 2011.
• Citações Web of Science: 16

Resumo

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. (AU)

• Processo FAPESP: 06/60641-6 - Estado dinâmico metabólico durante cargas constantes em cicloergômetro
• Beneficiário: Maria Augusta Peduti Dal Molin Kiss
• Modalidade de apoio: Auxílio à Pesquisa - Regular