The Bosu Bt Pro Byob Balance Training Ball delivers a workout aimed at developing core strength and stability that challenges the whole body. Take your squats, crunches, lunges, and stretching exercises to a more intense level. Whether the goal is to tone and strengthen, enhance agility, supplement physical therapy recovery, or an intense cardio session, the ball used by therapists and trainers can also be used in the comfort of your home. This workout and balance ball's half-ball design creates stability to force engagement of muscle training. Ideal for a variety of sports training, balance, and plyometric drills train muscle explosiveness and acceleration. Train multiple muscle groups and multiple joints with a workout that challenges the entire body.