Pre-exercise nutritional strategies: effects on metabolism and performance

Hargreaves, Mark 2001, Pre-exercise nutritional strategies: effects on metabolism and performance, Canadian journal of applied physiology, vol. 26 (Suppl.), pp. 64-70.

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Title Pre-exercise nutritional strategies: effects on metabolism and performance
Author(s) Hargreaves, Mark
Journal name Canadian journal of applied physiology
Volume number 26 (Suppl.)
Start page 64
End page 70
Publisher N R C Research Press
Place of publication Ottawa, Canada
Publication date 2001
ISSN 1066-7814
Keyword(s) Muscle glycogen
Blood glucose
Plasma FFA
Fluid balance
Summary The goals of pre-exercise nutritional strategies are to optimise the availability of carbohydrate (CHO) and fluid. Ingestion of CHO 3-4 hr prior to exercise can increase liver and muscle glycogen stores and has been associated with enhanced endurance exercise performance. The metabolic effects of CHO ingestion persist for at least 6 hr. Although an increase in plasma insulin following CHO ingestion in the hour prior to exercise inhibits lipolysis and liver glucose output, and can lead to transient hypoglycemia during subsequent exercise, there is no convincing evidence that this is always associated with impaired exercise performance. Having said that, individual experience should inform individual practice. Interventions to increase plasma FFA availability prior to exercise have been shown to reduce CHO utilisation during exercise, but do not appear to have major ergogenic benefits. It is more difficult to hyperhydrate prior to exercise and although there has been interest in glycerol ingestion, to date research results have been equivocal. At the very least, athletes should ensure euhydration prior to exercise.
Notes International Congress on Nutrition and Athletic Performance (1st : 2001 : Edmonton, Alta.)
Language eng
Field of Research 110602 Exercise Physiology
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2001, Canadian Society for Exercise Physiology
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Document type: Journal Article
Collections: Faculty of Health
School of Health Sciences
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