To determine the effects of water exercise on the movements of multiple sclerosis patients, this study utilized tests to determine changes in the linear range of motion of the shoulder, elbow, and wrist after a 45-minute period of water activities and to determine if the movement became more effective. The test used was an overhead throw with a 13-inch ball, and involved three subjects--two female and one male. The findings showed that, except for the horizontal motion of the shoulder, range of motion, force production, and horizontal ball velocity increased. (DS)