DYNA-BAND® originated in hospitals for use in rehabilitation, to stregthen and repair muscles after injury. This idea has been developed further to produce a fitness / training aid to enhance player's physical performance. By Providing resistance for muscle to work against, DYNA-BAND® exercises compliment training sessions in the gym, encourage muscle balance (especially in the young) and help to prevent muscle injury when used in a warm up programme. The DYNA-BAND® is a simple and effective, providing resistance for your muscles to work against. You can exercise your hips, thighs, waist, arm and stomach muscles safely, with very little time or effort and see fabulous results fast.