and I don't know about you, but I workout to look good and be athletic. There is a lot more to a muscle then just mass. Athletic muscles are also flexible, cooridinated, balanced, fast, have endurance, etc. A flexible muscle is a stronger muscle.
He honed those muscles and built that core with yoga. The probodx workout I alluded to earlier in this thread was big with a few athletes such as Troy Palamalu. With Probodx- you never life a weight over 10#s. You don't have to put up 405 to be strong. I myself for years would rep out at 315. But that is hell on your joints after awhile. Now I do probodx, yoga, and a few others . I don't put up big weight, but I feel stronger, and I am faster and more athletic