Fitness Ball

FITTER FITNESS BALL :: Now all runners can enjoy the fun and conditioning benefits of working out with the Ball! Build strength, stability, flexibility and coordination with this great exercise and fitness aid. Get the Right Fitness Ball for Your Height 55cm = 5'-2" to 5'-6" (Purple) 65cm = 5'-6" to 6'-4"(Blue) 75cm = 6'-4" plus(Silver).