It actually is. Football is legitimately one of the most physically demanding sports out there, proven through actual research and all that. Don't be a smartass.
Football and Baseball are the most exciting for me to watch, but I have to give Baseball the edge when it gets to the postseason. Any ol' normal game I'll watch football, but if a (tightly contested) playoff baseball game is on, forget about it. That's in terms of the pros though. College football tops both of them in my mind.