HARP

However, the distance from hip center to ankle (harp) 1. also measures what the knee angle is, flexion/extension 2. measures hip flexion/extension 3. measures the effective spatial orientation to the floor 4. scales everything, scope of action to patient stature 5. measures (in cms, inches, or statures) forward progression 6. measures (in cms, inches, or statures) clearance contributions All this from the same data as knee angle. So we have the hip to ankle line relative to the room... Hip Ankle Relative Positioning . HARP Line vs knee angle (measure same thing?)