Most scientific studies are isolated studies out of context of the spectrum of human movement demands. Science needs to measure an isolated component in order to conduct ?valid? scientific experiments. I understand that those are the rules of the game for the scientist, but outside the lab in the real world of performance the rules are different. On the field or in the pool we cannot isolate variables. Does that mean we should reject science and rely solely on practice and experience, absolutely not. As coaches we need to travel in both worlds. As a coach, statistical significance does not mean anything to me, I am interested in coaching significance and how it applies to making a particular exercise or training method more effective. The great coaches I have known are both artists and scientists. They know what canvas to paint on, what brushes to select, the brush strokes to use and how to blend the colors to achieve the result they desire. We must get all the pieces working in harmony. In performance the essence is linkage and connections, not isolation. Therefore the training should reflect this and focus on muscle synergies and connections.