A comparison of performance measures following two different loading parameters in the back squat exercise

Abstract

The purpose of this study was to assess athletic performance measures following two different loading conditions in the back squat exercise. Fourteen NCAA Division I tennis players were randomly assigned to either a low-resistance (50-60% of 1 repetition maximum [1RM]) training group or a high-resistance (65-90% 1RM) training group. The eight weeks of training consisted of 3 training sessions per week using a complete strength training program designed for sport performance enhancement. Performance in the 1RM back squat, 10 yard sprint and a countermovement vertical jump (CMJ) was assessed. There were no significant pretest to posttest differences in improving lower-body power production as measured by the 1 RM back squat, 10yd sprint and countermovement vertical jump in either group. The results of this study indicate that low-resistance, high-velocity training and high-resistance, low-velocity training is equally effective for improving lower-body power production.