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

Psychophysiology
Adriano E Lima-SilvaMaria Augusta P D M Kiss

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 VO2 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 VO2 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.

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Citations

May 18, 2010·European Journal of Applied Physiology·Adriano E Lima-SilvaFlávio O Pires
May 10, 2013·Sports Medicine·Carlos Rafaell Correia-OliveiraAdriano Eduardo Lima-Silva
Dec 16, 2011·Journal of Sports Sciences·Christiano Robles Rodrigues AlvesBruno Gualano
Aug 3, 2013·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Adriano E Lima-SilvaDavid Bishop
Feb 18, 2011·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Timothy David Noakes
Mar 25, 2014·European Journal of Applied Physiology·I HalperinD G Behm

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