The GMFM is a standardized observational instrument designed and validated to measure change in gross motor function over time in children with Cerebral Palsy. Two versions exist: the original 88-item measure (GMFM-88), used in this study, and the 66-item measure (GMFM-66). There is a four-point scoring system for each of the items on the GMFM, and the assessment is divided into five Di-mensions: (A) Lying and Rolling, (B) Sitting, (C) Crawling and Kneeling, (D) Standing, and (E) Walking, Running and Jumping. The GMFM-88 item scores can be summed to calculate raw and percent scores for each of the five dimensions. Because all of the children were at Level I on the Gross Motor Function Classification System for children with Cerebral Palsy only the complete Dimension E (items 65 - 88) was administered and scored pre and post treadmill training to measures changes in walking, running and jumping.