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Self-control exertion and glucose supplementation prior to endurance performance
journal contribution
posted on 2017-01-25, 13:18 authored by Ruth Boat, Ian TaylorIan Taylor, Carl HulstonObjectives
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.
History
School
- Sport, Exercise and Health Sciences
Published in
Psychology of Sport and ExerciseCitation
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.Publisher
© ElsevierVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Acceptance date
2016-12-22Publication date
2017Notes
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.2016.12.007ISSN
1469-0292Publisher version
Language
- en