For some reason Ralph Mann doesn’t get a lot of buzz. Perhaps he is like Mike Stone, cold and to the point with no fluff. I love Ralph Mann’s work and come to similar conclusions of what is happening but not why it’s happening. My feelings are that arms are important and the art is making sure they don’t interfere and synchronize with the whole body, not just the legs. I consider the transition from start to top speed is a focus on the feedback beween the athlete and the ground, not some artificial strategy of phases. His book on sprinting and hurdles has multiple editions, like the A-Team, if you can find it! I found the information far more useful than Running, but anatomically the Bosch text is valuable.