Inclusion Criteria:  1) children who could walk independently or with assistive devices ,2) children with motor dysfunction graded as a 1 or 2 on the Gross Motor Function Classification System (GMFCS), 3) children scoring 1or1+ on the Modified Ashworth Scale (MAS), 4) Dynamic ankle contracture which was confirmed if ankle equinus was observed during ambulation and passive dorsiflexion of the ankle could be accomplished beyond the neutral position with knee extended  Exclusion Criteria:  1) children older than 9 years or younger than 7 years, 2) previous botulinum toxin type A injection in the gastrocnemius muscle or serial casting of the ankle within 6 months prior to enrollment, 3) fixed ankle contracture, and 4) surgery of the lower limbs in the past 12 months.