Originally Posted by hhnngg1

Dont' disagree here. Heavy folks exist in every sport.

But like it or not the penalty for being heavy (or fat) in running is much more significant than cycling, even on hillfest courses. This is again, extremely well known in triathlon.

And the fatter you get in running, the harder you work and the more calories you burn to maintain the same speed, even on flats and downhills.