Even champions were beginners once. Nobody really knows their potential as a sportsman or woman at the outset. But many people have absolutely no idea how to exercise or train for their chosen sport. Sometimes their coaches are inadeqately trained. Many are well meaning and enthusiastic amateurs, perhaps parents, with no knowledge of exercise physiology, sports psychology or biomechanics. What is biomechanics anyway? As a student Stephen Walker was the victim of such poor standards of sports coaching but this left him with a thirst for knowledge about the building blocks of success. Now, as a...