One of the weakest parts of the shoulder are the external rotation muscles. This device allows you to target those muscles exactly and build them to increase shoulder stability and prevent injuries. Awesome!
If you have had shoulder physical therapy you know what this is. The pulley system fits over the door and works to increase your active range of motion. If you haven't had surgery this is a great way to keep your shoulders flexible and in shape.
These are inflatable balls used for balance training, stretching and the best sit ups you'll ever do.
The ultimate sit-up: Sit upright on the ball. Walk your legs forward until the ball is beneath your lower back. Lean back slowly and the perform sit ups as usual. The instability of the ball makes short work of the abdominal muscles and you'll build abs quickly.
You can also twist to side (alternating sides) to tackle the side the of torso.