The stability ball is an inexpensive piece of exercise equipment that is a great tool to help you get in shape. The stability ball forces your body to stabilize itself while doing exercises. This 44 minute routine uses functional movements to focus on the core and lower body. This workout also helps strengthen those small, vital stability muscles which will help to correct muscle imbalances. In a recent study published in the Journal of Strength and Conditioning Research, experts found that stability ball training does improve spinal stability, noting that this kind of training "might be beneficial to individuals who spend a good deal of time sitting or for individuals who are prone to back pain and have been cleared to exercise."