The 45 cm Stability Ball is the perfect functional fitness addition to strengthen core, stabilizing muscle groups. A primary benefit of exercising with Stability Balls, Exercise Balls or Yoga Balls as opposed to exercising directly on a hard flat surface is that the body responds to the instability of the ball to remain balanced, engaging many more muscles to do so. Those muscles become stronger over time to keep balance. Most frequently, the core body muscles — the abdominal muscles and back muscles — are the focus of exercise ball fitness programs.

Choose 45 CM Stability Balls, Exercise Balls, Gym Balls, Swiss Balls and Fitness Balls if you're under 5'1" in height for typical use.