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HAFF G. GREGORY; KIRKSEY, K. BRETT; STONE, MICHAEL H.; WARREN, BEVERLY J.; JOHNSON, ROBERT L.; STONE, MEG; O'BRYANT, HAROLD; PROULX, CHRIS
Journal of Strength and Conditioning Research: November 2000
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ABSTRACTThe effects of creatine supplementation on force-time curve (FTC) characteristics were investigated in collegiate track athletes. Sixteen male and 20 female athletes were randomly divided into a placebo (P, n = 21) and a creatine (Cr, n = 15) group. Six weeks of supplementation consisted 0.3 g per kilogram of body weight per day of Cr monohydrate or non-nutritive placebo. Subjects were involved in a periodized weight-training program centered on explosive exercises. Pretesting and posttesting consisted of 7-site skinfold analysis, countermovement vertical jump (CMJ), and static vertical jump (SJ). SJ was performed on a 61.0-χ 121.9-cm ATMI (Advanced Medical Technologies, Newton, MA) force plate and was analyzed for FTC. No differences were found between the 2 treatments for FTC. The CMJ showed a significant group by time interaction with the Cr group improving at a greater rate than did the P group. Lean body mass (LBM) significantly increased in the Cr group after the treatment period. These results suggest that 6 weeks of Cr supplementation can favorably enhance LBM and CMJ performance in track athletes.

The effects of creatine supplementation on force-time curve (FTC) characteristics were investigated in collegiate track athletes. Sixteen male and 20 female athletes were randomly divided into a placebo (P, n = 21) and a creatine (Cr, n = 15) group. Six weeks of supplementation consisted 0.3 g per kilogram of body weight per day of Cr monohydrate or non-nutritive placebo. Subjects were involved in a periodized weight-training program centered on explosive exercises. Pretesting and posttesting consisted of 7-site skinfold analysis, countermovement vertical jump (CMJ), and static vertical jump (SJ). SJ was performed on a 61.0-χ 121.9-cm ATMI (Advanced Medical Technologies, Newton, MA) force plate and was analyzed for FTC. No differences were found between the 2 treatments for FTC. The CMJ showed a significant group by time interaction with the Cr group improving at a greater rate than did the P group. Lean body mass (LBM) significantly increased in the Cr group after the treatment period. These results suggest that 6 weeks of Cr supplementation can favorably enhance LBM and CMJ performance in track athletes.

© 2000 National Strength and Conditioning Association