Effect of thirty days of creatine supplementation with phosphate salts on anaerobic working capacity and body weight in men.
The purpose of this study was to determine the effect of 30 days of single-dose creatine supplementation with phosphate salts (CPS) on body weight (BW) and anaerobic working capacity (AWC) in men. Using a double-blind design, 32 men randomly received 1 serving of either CPS (5 g Cr + 4 g phosphate) (n = 17) or 20 g of dextrose as placebo (PL) (n = 15) for 30 days. AWC determined from the Critical Power Test and BW were measured at baseline, 10 days, 20 days, 30 days, and 10 days post-supplementation. Results (2 x 5 ANOVA) showed no significant differences between groups for AWC at any time point; however, BW was significantly increased at 10 days in the CPS group (1.0 kg) vs. PL (0.0 kg), and remained elevated for the duration of the study. These findings suggest that a single 5 g x d(-1) dose of CPS for 30 days increases BW but is not effective for increasing AWC in men.
Eckerson
Joan M
JM
Department of Exercise Science, Creighton University, Omaha, Nebraska, USA. eckerson@creighton.edu
Bull
Anthony A
AA
Moore
Geri A
GA
D000328:Adult; D015308:Anaerobic Threshold / Q000187:drug effects; D000704:Analysis of Variance; D001835:Body Weight / Q000187:drug effects*; D019587:Dietary Supplements; D004311:Double-Blind Method; D004334:Drug Administration Schedule; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000187:drug effects* / Q000502:physiology; D010725:Phosphocreatine / Q000008:administration & dosage*; D010806:Physical Education and Training / Q000379:methods; D010807:Physical Endurance / Q000187:drug effects*; D011336:Probability; D012016:Reference Values; D012680:Sensitivity and Specificity
D010725:Phosphocreatine