Gurin massage roller allows you to reach all muscle groups of arms, head, neck, waist, shoulders, back, legs, and feet. Gently apply 20 strokes on each body part by yourself or with assistance. Relieve muscle pains of occupational overuse syndrome. Release the chronic patterns of tension in the body on the contracted area. Warm-up before exercises to prevent sports injuries. Recover tired muscles and reduce soreness after exercise. Reduce fat and keep body slim through slow strokes on each body part. Ease drowsiness, insomnia or headache by rolling on neck and forehead. Magnets massage roller (Model GMR-210MG) can generate a negative magnetic field to encourage blood circulation and healthy metabolism. MG version increased the alkaline level of body, neutralizing acids to maintain body's natural balance.