When we direct, we must not worry about muscle tension and think instead about the relations of body parts. Muscles -- even when we are over

For many of us, this is a difficult step to take because we want to change things, to work at things, to do something to make things better,

Muscles are meant to work elastically and we tend to shorten them, we have to think in such a way that the muscles let go and the parts go a

The upright support system, as we've seen, is highly unstable; once it begins to work inefficiently, muscles begin to compensate and it

But our upright design did not come out of nowhere. It evolved sequentially from earlier and more primitive forms of posture and movement—a