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The purpose of this study was to verify the effects of muscle strength and muscle power after rehabilitation exercise program following anterior cruciate ligament (ACL) reconstruction. Ten male are participated. All subjects were surgical operated on a part of ACL Measurement items were body compositions and a peak torque, average power, peak torque per body weight, total work of isokinetic muscle flexion and extension in respectively 60o/sec and 180o/sec. A schedule of rehabilitation exercise divided four stages. Subjects were assigned to a supervisor and given a rehabilitation exercise program three days a week during 12 weeks. The present study showed that peak torque during extension at 180o/sec is increased, and there were improved a peak torque per body weight during extension at 60o/sec and 180o/sec. There were significant differences on peak torque during flexion at 60o/sec between after than before exercise, and also total work at 180o/sec during extension was gained. Average power was increased at 60o/sec during flexion and extension, and there was gained at 180o/sec during flexion an after than before rehabilitation exercise program.
