Reductionist thinking on movement is mentally convenient. It is very easy to break the body and movements into parts and separate systems and focus on the parts to the exclusion of the whole. It may be convenient and easy but is not right. The body is all about connections, chain reactions and synergies. To optimally prepare the body for the stresses of competition you must focus on enhancing those connections and synergies. Give the body credit for what it can do, it is smart, so coach it as smart. Good coaching is giving the body increasingly complex movement problems to solve and putting the body in positions to solve those problems.