HARP

The M of the top graph = top center-of-mass in the pelvis [RED] as it goes up & down as walking progresses. The lower M shaped graph is pressure push-back as it reflects the top graph’s travail against gravity. It is for the middle graph to flatten both the top anti-gravity elevation as well as reduce ground reaction push back pressure on the feet. The middle graph is called : “Winning the war of humanity against gravity!” That name hasn’t caught on, so we are stuck with an easy but wrong name - KNEE ANGLE graph, dripping in mud.