The purpose of this study was to examine the effects of 7 weeks of isokinetic training on knee extension and flexion peak torque, torque acceleration energy, average power, and total work, and to observe the relationship between the increases in each of the isokinetic measures. Seventeen intercollegiate lacrosse players served as subjects and were assigned to an exercise or control group. Isokinetic training consisted of 3 sets of 25 repetitions at 270°/sec, 3 days per week for 7 weeks on an orthotron isokinetic dynamometer. All subjects were tested on a Cybex® isokinetic dynamometer at speeds of 60, 180, and 270°/sec pre- and post-exercise or control condition. Results showed a significant training effect at 270°/sec for knee extension peak torque, torque acceleration energy, and average power, and knee flexion torque acceleration energy. High correlations were observed between the increases in peak torque, average power, and torque acceleration energy. These findings suggest that increases in average power, peak torque and instantaneous power may be expected as a result of isokinetic exercise training in healthy athletes.
J Orthop Sports Phys Ther 1989;10(12):495-498.