Untreated impairments of range of motion, balance, and economy of movement may become highly disabling. Short term improvements of range of motion and balance occur with exercise. If the patient can sustain such improvements after a supervised exercise program is completed, these functionally limiting impairments may be delayed. Additionally, if exercises for spinal range of motion are coupled with functional retraining, the patient should improve in overall physical functional ability. Therefore, this study will establish the overall impact of a targeted exercise program for people with PD in terms of balance, economy of movement, and overall functional ability.