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Date Permissions Signed
Date of Award
Master of Science (MS)
Health and Human Development
Brilla, Lorraine R., 1955-
Suprak, David N. (David Nathan)
San Juan, Jun G.
Creatine supplementation is an ergogenic aid that is often used to enhance resistance training. Electrolytes can help to increase the absorption of creatine. This study examined effects of two differently formulated creatine supplements, creatine monohydrate (CM) or creatine-magnesium chelate (CE), compared to placebo on fatigue, work, and power during knee extensions. Subjects (n=23; 21.9±1.8 years) maintained their regular resistance training program and had not supplemented with creatine in the previous 6 months. Supplementation was 4 g creatine daily for CM and CE, plus 400 mg magnesium in CE. Maximum torque and fatigue of knee extensions at 180 ° sec-1 were determined using an isokinetic dynamometer for 2 sets of 30 repetitions each, with 2 minutes rest between sets. Fatigue was calculated by the ratio between the first 1/3 and the last 1/3 of work for each set. Body composition was determined via a three-site skin-folds using standard calipers. Statistical analyses were performed using mixed ANOVA. Fatigue results demonstrated no significant differences (p > 0.05). For work and average power, there were no significant interaction effects (p > 0.05) in either set 1 or 2. There was a significant time effect for work (1987.49±617.65 J, CM: 1978.55±723.21 J, CE: 2485.57±677.58 J; p = 0.001; ηp2=0.371) and average power (165.4±70.33 W, CM: 160.59±56.28 W, CE: 186±66.71 W; p = 0.003; ηp2=0.407) in set 1; with no significant differences in set 2 (p > 0.05). There were no significant effects of time or group for body composition (p > 0.05). There were no significant differences in these variables for the second set in any group. Supplementation with a creatine-electrolyte formula may help increase total work and average power in resistance-trained individuals.
Western Washington University
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Miller, Donnelly R., "Six Weeks of Creatine-Electrolyte Supplement Effects on Muscle Fatigability" (2017). WWU Graduate School Collection. 596.