Journal article

EFFECT OF CARBOHYDRATE FEEDINGS ON MUSCLE GLYCOGEN UTILIZATION AND EXERCISE PERFORMANCE

M HARGREAVES, DL COSTILL, A COGGAN, WJ FINK, I NISHIBATA

MEDICINE AND SCIENCE IN SPORTS AND EXERCISE | WILLIAMS & WILKINS | Published : 1984

Abstract

Ten men were studied during 4 h of cycling to determine the effect of solid carbohydrate (CHO) feedings on muscle glycogen utilization and exercise performance. In the experimental trial (E) the subjects ingested 43 g of sucrose in solid form along with 400 ml of water at 0, 1, 2 and 3 h of exercise. During the control trial (C) they received 400 ml of an artificially sweetened drink without solid CHO. No differences in VO2, heart rate, or total energy expenditure were observed between trials; however, respiratory exchange ratios were significantly (P less than 0.05) higher during E. Blood glucose was significantly (P less than 0.05) elevated 20 min post-feeding in E; however, by 50 min no d..

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