It depends on how you define a sport I suppose. IMHO it is the purest form of a sport. Anyone can walk into a gym, regardless of race, gender, creed, religion, education, etc. and give it 100% and be the best they can be. It is a constant and continual competition against yourself (and others if you choose). To be the best requires as much, if not more, devotion and sacrifice than any other 'sport' I can think of. To me, that makes it almost the epitome of a sport.