Effect of Carbohydrate and Prolonged Exercise on Affect and Perceived Exertion

Backhouse, Susan H., Bishop, Nicolette, Biddle, Stuart J.H. and Williams, Clyde (2005) Effect of Carbohydrate and Prolonged Exercise on Affect and Perceived Exertion. Medicine and Science in Sports and Exercise, 37 10: 1768-1773. doi:10.1249/01.mss.00001818377.77380.80

Author Backhouse, Susan H.
Bishop, Nicolette
Biddle, Stuart J.H.
Williams, Clyde
Title Effect of Carbohydrate and Prolonged Exercise on Affect and Perceived Exertion
Journal name Medicine and Science in Sports and Exercise   Check publisher's open access policy
ISSN 0195-9131
Publication date 2005-10
Sub-type Article (original research)
DOI 10.1249/01.mss.00001818377.77380.80
Volume 37
Issue 10
Start page 1768
End page 1773
Total pages 6
Place of publication x
Publisher The American College of Sports Medicine
Language eng
Subject 170114 Sport and Exercise Psychology
Abstract Introduction: It has been reported that perceptions of exertion are attenuated during prolonged cycle exercise, following CHO ingestion. However, no studies to date have examined the influence of such feedings on psychological affect during prolonged exercise, even though affect and perceived exertion are different constructs. Purpose: To examine the influence of regular CHO beverage ingestion on affect (pleasure–displeasure) and perceived exertion during prolonged cycle exercise. Methods: In a randomized, double-blind, counterbalanced design, nine endurance trained males cycled for 2 h at 70% [latin capital V with dot above]O2max on two occasions, separated by 1 wk. On each occasion, they consumed either a water placebo (PLA) or a 6.4% carbohydrate-electrolyte solution (CHO) immediately before they cycled (5 mL·kg-1 body mass) and every 15 min thereafter (2 mL·kg-1 body mass). Pleasure–displeasure was assessed before, during, and after the prolonged bout of cycling. Results: During exercise, reported pleasure initially improved and was subsequently maintained in the CHO trial, in contrast to a decline reported in the PLA trial. Ratings of pleasure–displeasure were more positive during recovery in the CHO trial compared with the PLA trial (P < 0.05) and the only significant increase (P < 0.05) in pleasure occurred 15 min postexercise in the CHO trial only. RPE increased (P < 0.05) over the course of the bout of cycling and was lower (P < 0.05) 75 min into exercise in the CHO trial. Immediately postexercise, plasma glucose concentration was higher in the CHO compared with the PLA trial (P < 0.05). A main effect of trial was found for plasma cortisol concentration, with higher values reported in PLA trial. Conclusion: Results suggest that CHO ingestion enhanced feelings of pleasure during and following prolonged cycling and highlighted the importance of assessing not only “what,” but also “how” a person feels.
Keyword affect
Human Rpe
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Human Movement and Nutrition Sciences Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 35 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Mon, 02 Mar 2009, 17:44:49 EST by Judy Dingwall on behalf of School of Human Movement and Nutrition Sciences