I took a break from casual cycling to have 3 kids and now I'm back and to make sure I'm cycling for physical fitness (and fun, of course) I decided to ride the Houston to Austin MS 150 next April. My initial goal is to loose a few pounds and then start getting in shape for the ride.

I was doing pretty good before I got my new road bike loosing about 1lb per week. I got the road bike and increased my rides from 6 to 10mi 4x per week and now I haven't lost a pound in over a month, but I am seeing my legs slim down some.

So, here's my question. From everyone's experience...how long does the "building muscle to power the bike" phase last and when should I expect to start seeing the pounds fall off again?