Injuries to the lower extremity happen frequently in judo, and in particular knee injuries may be severe. This study evaluated isometric muscle strength of knee extension and flexion in athletes performing Judo by using KIN-COM500 (CHATTECX, USA).
We clinically examined 19 amateur judo athletes with or without knee injuries. Ten of them had symptoms or episodes of knee injuries during their judo carreer. They had a high level of muscle strength in their thigh muscles. Maximum power of knee extension was 11.02N/kg at 60deg. flexion posture, and knee flexion was 7.36N/kg at 30deg. flexion posture. In the group with meniscal injuries, quadriceps muscle weakness was found. In cases with meniscal injuries, it is important to do muscle strength ening exercises for knee extension.
