XMark 60cm - 65cm Anti Burst Exercise Ball with Pump and Workout DVD, The XMark 60 to 65cm Studio Quality Anti-Burst Fitness Ball is very effective in developing your core, It works multiple muscles at one time while forcing your body to balance itself, This creates an extremely effective and challenging workout, Additional muscles are activated that work to keep you balanced on the ball, That means you are now working harder and essentially getting more bang for your buck while not increasing your exercise time, Having a strong core improves your performance in all activities, not just exercise but also daily chores like carrying groceries, The ball can help improve your posture, balance, and core strength, With the XMark 60 to 65cm Anti-burst Fitness Ball you can work your legs, arms, chest, back, and abdominals, Features:, - Club quality anti-burst 60/65 cm fitness ball (Color Blue), - Includes DVD workout video and 5"" foot pump, - Helps relax muscles, remove tension and increase tone, - Increases flexibility in abdominals, thighs and lower back, - Strengthens and tones arms and muscles, Club quality anti-burst 60/65 cm fitness ball (Color Blue), Includes DVD workout video and 5"" foot pump, Helps relax muscles, remove tension and increase tone, Increases flexibility in abdominals, thighs and lower back, Strengthens and tones arms and muscles SKU: FSFT174