SPORTS INJURIES IN TERMS OF BIARTICULAR MUSCLE FUNCTION

In young athletes, bi-articular muscle injury from an indirect force u sually occurred at the attachment of the muscles. We reviewed these in direct injuries and an attempt was made to analyze the mechanisms of t hese fractures using electromyography and motor-evoked potentials (MEP s) by transcranial magnetic stimulation. Particular consideration was given to the stress imposed on bi-articular muscles. Previous reports indicated that the stress might concentrate in the origin of the sarto rius and tensor fascia lata during sprinting, in the origin of the rec tus femoris during ball kicking, and in the insertion of the rectus fe moris during vertical jumping.