Jason Hettler of Hettler Performance has written a nice blog on the art and science of coaching, a topic that always creates debate and discussion on Art vs Science, when of course coaching is a continual process of testing and evaluating hypotheses, so it's not either or by any means.
The following quote nicely sums up my view on art and science in coaching:
“That being said, coaching is more than its individual parts – the sciences. It is the fluid, dynamic and ever-evolving interplay of these parts that create the whole. A whole which cannot be reduced to one element just as a cloud cannot be reduced to one particle. The art comes from blending these sciences into working with inherently individual athletes and maneuvering through any and all obstacles that will arise on a daily basis. The art comes from experience.”