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Int J Sport Nutr Exerc Metab. 2007 Oct;17(5):456-67.

The effects of nutritional supplementation throughout an endurance run on leucine kinetics during recovery.

Author information

1
Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA.

Abstract

This study determined the effect of nutritional supplementation throughout endurance exercise on whole-body leucine kinetics (leucine rate of appearance [Ra], oxidation [Ox], and nonoxidative leucine disposal [NOLD]) during recovery. Five trained men underwent a 2-h run at 65% VO(2max), during which a carbohydrate (CHO), mixed protein-carbohydrate (milk), or placebo (PLA) drink was consumed. Leucine kinetics were assessed during recovery using a primed, continuous infusion of 1-13C leucine. Leucine Ra and NOLD were lower for milk than for PLA. Ox was higher after milk-supplemented exercise than after CHO or PLA. Although consuming milk during the run affected whole-body leucine kinetics, the benefits of such a practice for athletes remain unclear. Additional studies are needed to determine whether protein supplementation during exercise can optimize protein utilization during recovery.

PMID:
18046055
[Indexed for MEDLINE]

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