Merrithew Stability Ball with Pump, 55cm, Black

Challenge your deep stabilizing muscles through active sitting and during your workouts to improve your balance, develop strength and enhance your muscle tone. The Stability Ball creates a plane of instability forcing joints and muscles to react to maintain balance, challenging coordination and improving your posture. After exercise, reduce muscle soreness and develop flexibility by using the ball to stretch and lengthen your muscles. Ideal for those 4 ft. 11 in to 5 ft. 3 in (150-160 cm) in height Anti-burst up to 550 lbs. (250 kg) Includes hand pump and bonus downloadable exercise guide See FAQs for help choosing your correct size and how to inflate