My basic reasoning for picking up bicycling was to lose weight. I have been trying to get my weight down to get my BP down (and get off my 3 BP meds). I did a weight loss contest at work last year that we called Belly Busters. I racked up about 1600 miles in my giant Cypress hybrid bike and lost 47 pounds and won the contest.
Unfortunately I put about 27 pounds back on over the winter so now I am back to losing weight I had lost last year.
I started a blog to track my progress and try to put some public pressure on myself. I can't say that it has helped much but I will try anything.
I would love it if some of you would check it out and comment. I put the link in my signature but messed it up.
The title is "Watch Dave Lose it" and the address is http://wrightideas.typepad.com/watch_dave_lose_it/
This year I upgraded to a Trek Portland commuter bike. I ride 27 miles round trip to work 3-4 days a week. And with my new Garmin Edge 305 I now know that I have about a 750 elevation gain and up to 18% grades on my commute. So it is a pretty tough ride and should whip me into shape.