Hi Matt. I see the business of personal training as an ART that applies the SCIENCE of how the human body works. In that respect I view attempts at systemizing how a trainer designs programs as removing the ART of what we do which is to design a fitness program that addresses the specific needs of a particular client. I see systems of training as detracting from that art, and not necessarily in a good way. I want a trainer who can think and plan on their feet, not one who simply follows a menu of exercises that has been pre-designed for them.
Are there advantages to having a fitness program ‘system?’ Absolutely! But in my opinion the disadvantages outweigh the advantages.