Interesting subject Adam came up with, doing a Vidio at the moment which covers this issue. I mentor a Sports Skills coach, who is about to get one of the best jobs in Football Lucky C##t . Doing it with all Sports in mind. Its great teaching skills, but where the problem lies is teaching the Nueromuscular System to cope with the messages they are given to perform actions, without getting injured while performing intricate skill manouvers. It just wont happen without good Biomechanical foundations without it its not happening. Too much stress and confusion will stop the flow of the movement. How this is enginered is the good bit`and Ive been told the best bit by the students. The bottom line is its all done on the principal of Feel.