Fitness Ball exercises are very effective at targeting those core muscles that are essential for stability and good posture but are often overlooked when exercising with fixed position gym equipment. Core exercises strengthen your abdominal muscles, back muscles and the muscles around the pelvis while helping you tone and trim your entire body. Our fitness balls include a compact hand pump for inflation. Fitness Ball exercises are very effective at targeting those core muscles that are essential for stability and good posture but are often overlooked when exercising with fixed position gym equipment.