We did Cybex testing of thirteen patients who had had a rupture of the
distal tendon of the biceps brachii. The tests were performed fifteen
months to six years after injury. The ten patients who had had a surgical
repair through the two-incision technique showed a return to normal levels
of strength and endurance with regard to both flexion of the elbow and
supination of the forearm. The three patients who had had conservative
treatment showed a remaining deficit in those parameters which was
clinically evident in several activities, such as use of a screwdriver or
baseball bat.