 The purpose of this study is to determine optimal parameters for dosing home-based treadmill training by comparing high-intensity 5 daysweek, twice daily for 10-20 min for 6 weeks to low-intensity 2 daysweek, once daily for 10-20 minutes for 6 weeks treadmill training; and to compare the effects of high- versus low-intensity treadmill training on walking attainment and overall walking activity in young children with cerebral palsy. 