SACH-SAWCH

So? Those graphs of joint motion “normal” in walking, are very misleading.

Perhaps they are normal for adults walking across an empty room in a leisurely way. No child EVER walks that way unless threatened to do so by an angry parent. In the gait lab: “BILLY!! Just once!! Walk the way mommy walks or we will never get home! No! Over there, across the glass plate!...” Normal” for children should be labeled as how children walk when threatened to walk like adults or else. Why? Kids are not about energy. They are learning the extremes of their walking instrument. A=====>B includes every puddle and challenging obstacle on the way. Therefore OUR first interest should be energy efficient adaptive skills to function in real environments. Failing that? Stepping or wind up toy walking. Those walking robots? Walking? All the ones I have seen are STEPPING and not using optimum energy transfer mechanisms [to save batteries?].