The patients with femur fracture,who were treated by balanced fixed traction frame,could move about in early stage,In order to explore its mechanism and the tendency of femur fracture recovery,21 patients have been measured.The measurements include dynamic and static measure- ment.The technique of gravity measuring platform has been used.Through the measurement,we could find that,in early stage,the loading power of fractured leg was about 10 kg.Most of the weight was undertaken by the crutches.In the early ...