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Int J Sports Med 2009; 30(12): 898-905
DOI: 10.1055/s-0029-1237710
Nutrition

© Georg Thieme Verlag KG Stuttgart · New York

Effect of Glycemic Index Meals on Recovery and Subsequent Endurance Capacity

S. H. Wong1 , Y. J. Chen1 , W. M. Fung1 , J. G. Morris2
  • 1The Chinese University of Hong Kong, Department of Sports Science and Physical Education, Hong Kong
  • 2Institute of Youth Sport, School of Sport and Exercise Sciences, Loughborough, United Kingdom
Further Information

Publication History

accepted after revision July 14, 2009

Publication Date:
10 December 2009 (online)

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Abstract

This study examined the effect of ingesting a high or low glycemic index (GI) meal during a short-term recovery period on endurance running capacity. On two occasions, seven men (age 30.0±2.6 yr, body mass 60.7±1.4 kg, VO2max 62.1±2.2 ml·kg−1·min−1) ran at 70% VO2max on a level treadmill for 90 min (R1), followed by a 4 h recovery (REC) and a further exhaustive run at the same speed (R2). Twenty minutes after R1, each subject consumed an isoenergetic meal containing either high GI (HGI, GI=77) or low GI (LGI, GI=37) carbohydrate providing 1.5 g CHO·kg−1 BM. During REC, subjects also ingested a prescribed volume of water equal to 150% of their BM loss during R1. The duration of R2 in the HGI trial was 15% longer than in the LGI trial (HGI: 86.6±10.7 min vs. LGI: 75.2±8.1 min, p<0.05). The subjects also achieved complete rehydration after REC on both occasions. In conclusion, the consumption of a HGI meal during a 4 h recovery improved endurance capacity in a subsequent run; however, the precise mechanism(s) by which this takes place is yet to be clarified.

Key words

carbohydrate - endurance running - short-term recovery - rehydration

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Correspondence

Dr. Y. J. Chen

The Chinese University of Hong Kong

Department of Sports Science and Physical Education

G12

Kwok Sports Buidling 852

Shatin

Hong Kong

Phone: 852-26096085

Fax: 852-26035781

Email: yjch@cuhk.edu.hk