So whats your "classification" of a sport? 
There are two similar discussions going on at the same time. This is what I just posted on the other one and I think it's appropriate here too...
bod·y·build·ing [bod-ee-bil-ding] –noun
the act or practice of exercising, lifting weights, etc., so as to develop the muscles of the body.
bod·y·build·ing (b?d'?-b?l'd?ng)
n. The process of developing the musculature of the body through specific types of diet and physical exercise, such as weightlifting, especially for competitive exhibition.
The definitions for footballl and baseball and hockey etc. describe them as a "game". So sport, it seems, must be a game of some kind which means that BB is a process or a practice or an art but not a sport.
Having now put to bed the definition of the word sport, the main thrust of this "sport/no sport" argument seems to be that BB is easy when compared to baseball or football and the like. That is quite untrue.