Are exercise balls a good workout?
In addition to exercise, stability balls are also often touted as a healthier alternative to sitting in a chair. Proponents of sitting on an exercise ball say that because the abdominal muscles must be constantly engaged, core strength, posture, balance and stability will improve.
How do you get a flat stomach with an exercise ball?
Does an exercise ball tone your stomach?
Even rocking on the ball with small movements causes the muscles to work together to regain balance and so further challenges the muscles. Rocking side to side and back and forth on the ball isolates the pelvis and works the lower back, abdominal muscles and hips.