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Title: Self-control exertion and glucose supplementation prior to endurance performance
Authors: Boat, Ruth
Taylor, Ian M.
Hulston, Carl J.
Keywords: Growth models
Ego depletion
Issue Date: 2017
Publisher: © Elsevier
Citation: BOAT, R., TAYLOR, I.M. and HULSTON, C.J., 2017. Self-control exertion and glucose supplementation prior to endurance performance. Psychology of Sport and Exercise, 29, pp. 103–110.
Abstract: Objectives Completion of a task requiring self-control may negatively impact on subsequent self-regulatory efforts. This study explored a) whether this effect occurs during a well-practiced endurance task, b) the potential for glucose supplementation to moderate this effect, and c) whether this effect differed over time. Method Fourteen trained cyclists completed four simulated 16 km time trials on an electromagnetically braked cycle ergometer. Prior to each time trial, participants completed a congruent Stroop task or an incongruent Stroop task that required self-control. They also received either a glucose-based drink or placebo. Participants' performance time and heart rate were recorded throughout the time trials. Results Multilevel growth curve analysis revealed a significant three-way interaction between self-control, glucose, and time (b = −0.91; p = 0.02). When participants did not exert self-control (congruent Stroop) or consume glucose (placebo drink) they were slowest during the early stages of the time trial but quickest over the full distance. No differences were found in heart rate across the four conditions. Conclusions Findings suggest that pacing may explain why self-control exertion interferes with endurance performance. Moreover, the debate revolving around depletion of self-control must consider that any observed effects may be dependent on the timing of performance inspection.
Description: This paper was accepted for publication in the journal Psychology of Sport and Exercise and the definitive published version is available at http://dx.doi.org/10.1016/j.psychsport.2016.12.007
Version: Accepted for publication
DOI: 10.1016/j.psychsport.2016.12.007
URI: https://dspace.lboro.ac.uk/2134/23872
Publisher Link: http://dx.doi.org/10.1016/j.psychsport.2016.12.007
ISSN: 1469-0292
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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