The Red Oscillating Bar is an excellent exercise accessory used to increase blood flow, promote flexibility, and increase strength in the arm and shoulder. Resistive exercises are performed by twisting the bar, bending the bar, and flexing the bar back and forth. Twisting and bending the instrument strengthens muscles in the hand and wrist. Shaking the 36 inch bar causes the instrument to flex, thereby creating force and requiring beneficial involvement of the arm and shoulder to control the bar. It is a great warm up or cool down exercise for throwing athletes. The red resistance bar is typically used by athletes fifteen years and older. As with all exercise devices, the Oscillating Bar should be used at the direction of a physician, trainer, or coach and always under adult supervision.