The TRNR BALANCE DISC is the perfect item for exercise and training. Designed with air pumps in mind for ease of use. It is also popular as a Pilates, fitness, gym, and yoga product. Both the protruding surface and the non-slip surface of the pressure point can be used, and it is effective for muscle training, home training, and full-body exercise. It helps with foot, ankle, knee, joint and postural support. It can also be used as a core cushion, making it ideal for workouts that strengthen your inner muscles. It comes with a pump, so you can use it handily at any time. It is also recommended as a substitute for a balance ball.