Originally Posted by
Lazyass
I've always wondered about this phenomenon. I have a fast metabolism and don't drink so I've been slim and @160lbs for the last 30 years. Couldn't get a potbelly if I wanted to. But I see guys on charity/group rides, club members who ride all the time and they keep their freaking potbelly. They usually wear club cut jerseys with loose sleeves but it doesn't hide anything. No, they usually aren't that fast but if someone rides all the time how does the potbelly not get burned off? Heavy drinking maybe?
Think about it: you're sitting on a chair, leaning forward, and turning your legs at a fast rate with little resistance. This is not going to lead to muscle tone in your upper body.
Mountain biking with a lot of climbing is better for upper body strength, but probably not a great workout either in that regard.