There is a movement of Bio-mechanics which is loosely explained as the ‘physics of movement’.  This is looking at the intrinsic value of natural movements and the mechanics of what goes on with our bodies and the amount of movement that we are capable of, the history of movement we are built upon genetically and the science on how the body can move (right down to a cellular and microscopic level).  Understanding movement and the possibilities therein has massive effects on how we can function more effectively and efficiently so that our whole system (not just our muscular/connective system) avoids pain.