Body is a complex adaptive system, not a bio-machine or bio-computer. Given that the body is a kinetic chain and all systems of the body work synergistically to produce efficient movement then training is all about connections. How can we better link, sync and coordinate to enhance efficient movement. Biomechanically it helps to think toe nails to finger nails, everything is connected.
The better and more effective the training the more effective the connections between body parts and the various systems of the body. In theory and for mental convenience we can isolate but that is not the way the body works in real life. As coaches, we need to consciously make connections to make training more effective and efficient. We need to understand that that although we may target a particular system i.e. neural, cardio vascular, endocrine hormonal that they all affected regardless of the emphasis. The ultimate connection is connecting training to the competition. Never lose sight of the fact that the goal of training is to prepare the athlete for competition, therefore all training must connect to competition by thoroughly preparing the athlete for the demands of the competition.