stability ball
...is exercise. However, utilizing correct posture and staying within the bodies’ limits, you eliminate the risk of any major injury. The modification I have chosen to the exercise changes the individuals body position and now places them lying on the ball as oppose to seated on the ball. They should lye on the ball placing the ball between there shoulder blades. Also, the individual must keep their pelvis up so that there body is in a straight line and their knees are bent at 90 degrees. The individual will be holding a medicine ball with their arms out stretched fully. The purpose of this modification is still to work the muscles that rotate the trunk. The change in body position and the fact that the individual now has to stabilize there body in proper alignment as well as perform the exercise of trunk rotation increases the intensity of the exercise. The modification also changes some of the muscles utilized to perform this exercise. The prime movers of the exercise remain the same as stated above. However, the assisting muscles of this exercise change due to the posture required to perform the exercise. In order to have the body in proper alignment the entire pelvic musculature as well as trunk musculature must be working to attain correct form. Also the lower extremity musculature involved is the quadriceps, hamstring, gastrocnemious and soleus. The purpose of the upper trunk rotation either seated on the stability ball or lying on the stability ball is to strengthen the transfer abdominus related trunk rotators. This is an extremely important exercise to any athlete or individual performing activities that are functional in nature and require them to dynamically rotate their trunk. There are two different postures utilized within our original exercise and its modification. The original exercise requires an upright-seated posture while the modification requires a supine posture with your shoulders on the ball. The equipment utilized as stated above are a stability ball and a medicine ball. The range of motion required of the individual performing the exercise is dependent upon their own bodie...