Is cycling the most physically demanding sport ?

[daveryanwyoming]

after triathlons it is........

Or try superalpine mountaineering or high altitude mountaineering or ultra-endurance running like the Leadville 100. There are plenty of sports that give cycling a run for its money. Cycling is great, but don't dismiss the training or day of event demands for lots of other sports. Try a speed ascent of a technical route on Denali if you want to see how far the human body can be pushed.

 

[Pendejo]

There's no answer to this question because there are too many variables. For example, which is more "physically demanding," to be in intense pain for ten minutes or moderate pain for two hours?

I've engaged in quite a few endurance sports and I do know this: I've never felt so totally fatigued as after a swimming workout. It's down to the bone and it lasts.