Gut-reduction?

Hello,

I used to be quite a svelte, trim cyclist until I got older, and
started gaining weight around the midsection (i.e. gut).

I still cycle, at least, 20 miles a day. I eat a pretty healthy, well-
rounded diet. I'm still a pretty slim person, Unfortunately my belly
seems to stay the same.

I've always heard that "spot-reduction" doesn't work (i.e. exercising
a certain area of the body reduces fat in that area). So, I haven't
done sit-ups yet. Should I?

I don't now if this question is rec.bicycles.soc worthy, but I'll ask
anyway: Do
you guys know a way to reduce belly-fat?

Regards,
Cullen