The effect of creatine monohydrate loading on maximal intermittent exercise and sport-specific strength in well trained power-lifters.

摘要

In this double-blind study the effect of creatine monohydrate loading (9 g/day) on maximal intermittent isokinetic exercise and sport-specific strength in 13 well trained power-lifters was ascertained. Both before and after supplementation the creatine (n=8) and placebo (n=5) groups performed 3 sets of maximal unilateral knee extensions on an isokinetic dynamometer interspaced with 60 s rest periods. This was followed up the next day by a maximal deadlift strength feat performed in a gymnasium. Values for peak torque, average power, total work and work output during the first 5 sample repetitions in the creatine group increased significantly and in a relatively constant fashion in all subjects (correlation coefficients ranged between 0.84 and 0.92) after 5 supplementation days. There was also a significant (p=0.010) increase in the deadlift lifting volume after 6 days of creatine supplementation. It is concluded that creatine monohydrate at 5 g/day for 5 and 6 days respectively, improves maximalintermittent isokinetic power output and sport-specific strength in well trained power-lifters.