We sized them up. We measured them, top to bottom. We've done our own Tale of the Tape, and we've come to a surprising conclusion. Pound for pound, the toughest sport in the world is . . .
The Sweet Science.
That's the sport that demands the most from the athletes who compete in it. It's harder than football, harder than baseball, harder than basketball, harder than hockey or soccer or cycling or skiing or fishing or billiards or any other of the 60 sports we rated.