I agree with what everyone else is saying- adding this:

Spinning will help you lose weight as will distance. I lost about 30 lbs the 1st year I started cycling. I only know this because I went to see the doctor a year after I'd started cycling and was weighed for the first time in a year. I was shocked! I knew I had changed, lost weight, but had no idea how much.

How did I manage to lose this weight? I started cycling about 10 miles 3 times a week and about 40 miles twice a week. The guys in my club were very patient with me and taught me how to spin efficiently. With time I got faster (I hate to be last so I really worked on my speed and hill training)and eventually was able to go longer distances (and not be the last one!).

The 2nd thing I did was to watch what I would eat after I came home from a ride. I'd have a recovery drink with milk and plain yogurt and often something salty. Also, I didn't drink soft drinks or alcoholic beverages. (Soft drinks are REALLY bad for us!!!!!)

Last year, I went in for a check up and weighed EXACTLY the same as I had the year before. That was comforting as then I knew that my diet was supporting my cycling.

We'll see how it turns out this year- I have a date with my doctor in a few weeks so I'll get my once yearly weigh in!