Originally Posted by
Machka
But when you come down the other side of the hill, you're burning next to no calories. It all averages out.
But it doesn't; You'll spend a lot more time going up than down. If you go up a 1 mile hill @ 10 mph, it will take 6 minutes. If you then turn around and go down at 30 mph, it will only take 2 minutes.