PURPOSE: The purpose of this study was to examine the effect of carbohydrate supplementation on differentiated and undifferentiated ratings of perceived exertion (RPE) during prolonged intermittent exercise and recovery. METHODS:Twelve male subjects cycled for 2.0 h at 64% Wmax and 73% V O2peak with 3-min rest intervals interspersed every 10 min (2.6 h of total exercise time, including rest intervals) with placebo (P) or carbohydrate (C) beverages. RPE was assessed during the last minute of each 10-min exercise interval and then every 30 s during the 3-min recovery period. RESULTS: The pattern of change in RPE over time was significantly different between C and P ingestion (P < 0.05), with attenuated RPE responses found for both overall body (O) and legs (L). A significant main effect was found for recovery RPE-O between C and P ingestion (P < 0.05), with attenuated RPE responses found in the later part of the 2-h run. C relative to P ingestion was associated with higher respiratory exchange ratios and plasma levels of glucose and with lower levels of plasma cortisol. CONCLUSIONS: These data indicate that carbohydrate supplementation attenuates perceived exertion during prolonged intermittent exercise and recovery.
RCT Entities:
PURPOSE: The purpose of this study was to examine the effect of carbohydrate supplementation on differentiated and undifferentiated ratings of perceived exertion (RPE) during prolonged intermittent exercise and recovery. METHODS: Twelve male subjects cycled for 2.0 h at 64% Wmax and 73% V O2peak with 3-min rest intervals interspersed every 10 min (2.6 h of total exercise time, including rest intervals) with placebo (P) or carbohydrate (C) beverages. RPE was assessed during the last minute of each 10-min exercise interval and then every 30 s during the 3-min recovery period. RESULTS: The pattern of change in RPE over time was significantly different between C and P ingestion (P < 0.05), with attenuated RPE responses found for both overall body (O) and legs (L). A significant main effect was found for recovery RPE-O between C and P ingestion (P < 0.05), with attenuated RPE responses found in the later part of the 2-h run. C relative to P ingestion was associated with higher respiratory exchange ratios and plasma levels of glucose and with lower levels of plasma cortisol. CONCLUSIONS: These data indicate that carbohydrate supplementation attenuates perceived exertion during prolonged intermittent exercise and recovery.
Authors: Shaun M Phillips; Anthony P Turner; Shirley Gray; Mark F Sanderson; John Sproule Journal: Eur J Appl Physiol Date: 2010-03-13 Impact factor: 3.078
Authors: Callum G Brownstein; Diana Rimaud; Benjamin Singh; Laurie-Anne Fruleux-Santos; Marine Sorg; Dominic Micklewright; Guillaume Y Millet Journal: Sports Med Open Date: 2021-04-08