Gym balls

when sitting on the gym ball, your knees should be roughly at a right angle with your feet flat on the ground. For most adults, this means a diameter between fifty-five and seventy-five centimetres. Look for the weight capacity and the anti-burst label, which means that if punctured, the ball will not burst all at once, but deflate slowly — a crucial difference when exercising with weights. A smaller soft Pilates ball (overball) is suitable for rehabilitation and exercises where you need gentle resistance.