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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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PRE-WORKOUT CARBOHYDRATE SUPPLEMENTATION DOES NOT AFFECT MEASURES OF SELF-ASSESSED VITALITY AND AFFECT IN COLLEGE SWIMMERS |
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Kathleen M. Hill1  ,
James R. Whitehead1, and Janice K. Goodwin2 |
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1Department of Physical Education, Exercise Science, and Wellness, and 2Department of Nutrition and Dietetics, University of North Dakota, Grand Forks, ND, USA |
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© Journal of Sports Science and Medicine (2011) 10, 478 - 482 |
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| ABSTRACT | |||
| Beneficial effects of dietary carbohydrate (CHO) on physical and
psychological parameters have been demonstrated in athletes. Because affect,
or mood, can predict athletic performace, the main objective of this study
was to determine the effect of pre-workout CHO on affect in swimmers. College
swimmers (n = 37) participated in a randomized crossover experiment of the
effects of a pre-workout CHO supplement on vitality and affect. Subjects
consumed a CHO supplement or placebo for two days before morning practice.
After each morning practice, swimmers completed measures of affect and feelings
of vitality. Pearson correlations were performed to describe relationships
among variables. Differences in means between the CHO and placebo conditions
were determined by paired t-tests. Independent t-tests were used to determine
differences in variables between the highest and lowest tertiles of breakfast
consumption frequency. All statistical analyses were performed using SAS
9.1.3 (Cary, NC) and statistical signficance was set at α = 0.05. There
were no significant differences in affect or feelings of vitality between
the CHO supplement and placebo conditions (all p > 0.15). Our
results do not support a beneficial effect of CHO supplementation before
morning swim practice on affect or feelings of vitality in swimmers. Key words: Nutrition, swimmers, mood. |
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