I bike to work when the weather and sunlight permit. I won't ride in the dark, so most of the winter, I stay off the bike. I only have about a 15 mile round trip, but it is enough that I can eat pretty much whatever I want during my riding season without gaining any weight. I always add a couple of pounds during the winter when I can ride and have to find other ways to exercise that aren't as much fun.

Biking is a great exercise since it is low impact (assuming you don't fall) and burns lots of calories. I used to enjoy running, but my knees can't take it any more and I need to save them for fishing.

Ted