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The Effect of Carbohydrate Supplementation on Multiple Sessions and Bouts of Resistance Exercise.

HAFF, G. GREGORY; STONE, MICHAEL H.; WARREN, BEVERLY J.; KEITH, ROBERT; JOHNSON, ROBERT L.; NIEMAN, DAVID C.; WILLIAMS, FRANKLIN JR; KIRKSEY, K. BRETT
Journal of Strength & Conditioning Research: May 1999
Original Article: PDF Only

The effects of carbohydrate (CHO) supplementation on multiple sets of resistance training exercise during the second training session on a given training day were examined with 6 resistance-trained men (mean +/- SEM; age: 24.3 +/- 2.1 years; height: 176.9 +/- 1.6 cm; body mass: 82.6 +/- 2.8 kg). The subjects participated in a randomized, counterbalanced, double-blind protocol with testing days separated by at least 1 week. A CHO supplement consisting of 0.3 g?kg body mass-1 or placebo (P) was ingested during the morning training session, 4 hours of recovery, and the sets of squats performed to exhaustion (STE). The STE consisted of sets of 10 repetitions of squats performed at 55% of 1 repetition maximum, with a 3-minute rest between sets, performed to muscular failure. Performance measured in number of sets (CHO: 18.7 +/- 4.8; P: 11.3 +/- 2.7), repetitions (CHO: 198.7 +/- 46.8; P: 131.0 +/- 27.2), and duration (CHO: 77.7 +/- 19.4 minutes; P: 46.1 +/- 8.9 minutes) were statistically different between the CHO and P trials. The results suggest that CHO supplementation enhances the performance of multiple STEs during the second workout on a given day.

(C) 1999 National Strength and Conditioning Association