In the gait of healthy adults, the ankle and hip joints play complementary roles and show a trade-off relationship. The objective of this study, was to investigate whether there is an immediate effect on the ankle and hip joints of cerebral palsy subjects in gait with enhanced ankle push-off. [Subjects] The subjects were a child and an adult with cerebral palsy and right side hemiplegia who could walk continuously for more than 10 m. [Method] We measured normal gait and enhanced ankle push-off gait with a 3D motion analysis system utilizing force plates and infra-red cameras, and calculated the ankle-hip joint (A2/H3) ratio at ankle push-off. Comparisons were made using the Mann-Whitney U test. [Results] We found an increase in the hip extension moment during enhanced ankle push-off gait, but the A2/H3 ratio did not show a significant increase. [Conclusion] In the performance of enhanced ankle push-off gait by the adult and child with cerebral palsy, it was not the ankle joint activity that was compensated, but that of the hip joint.