Commuting wasn't quite enough for me. 3 yrs ago I lost 30lbs, (200 to 170) :), mostly from riding my bike. At that time my commute was only 3 mi one-way.

So I started doing a 4-5 mi ride at lunch, seeking interesting places to eat. On my ride home I would extend my ride to a 6-8 mi ride depending on time. With weekends I was putting in about 80 mi per week.

In addition, I started dieting. Sweets are my addiction. I had to be strict with myself. Since then I have slacked off on the diet part. Back up to 180 now. :(