Although I've been doing conditioning for well over a year now, I didn't know that another name for what I was doing was functional training. This book cleared up my confusion and helped me to understand what some of the classes I was taking in the gym were about. I basically see functional training as conditioning that moves the body in multiple planes--backwards, forwards, laterally--that integrates multiple muscle groups, that resembles the types of things we do in real life, such as bending over, and that builds a strong core, because our core protects most of our vital organs and most of our movement and all of our balance emanates from our core. While yes, having a well sculpted and toned body is nice, being able to step out of bed in the morning without stiffness or being able to bend down to pick up something I've dropped without hurting my back while listening to my knees pop is more important. However, I would recommend also adding one day each week of isolation training, or machine weights, to increase muscle mass. If you can have a sculpted, functional, and strong body, why choose?