Fifty-four college-aged males were randomly assigned to one of three experimental training groups to determine the effects of slow, fast, and the combination slow and fast speed dynamic concentric weight training on leg power. Each group trained the legs with squats, leg extensions, and heel raises. Pre-, mid, and post-testing included one repetition maximum in the squat, the vertical jump without the use of the arms, and leg power using the Lewis formula. A two-way ANOVA with repeated measures showed that each group significantly (p<0.05) gained in leg power, but significant differences between the groups did not exist. It was concluded that neither slow, fast, nor the combination slow and fast repetition training speeds was superior in developing leg power in untrained college-aged men.
(C) 1987 National Strength and Conditioning Association