I'm 57 years old and lost 39 lbs in four months this year. I rode four or five days a week and walked the others. Cut out starches and increased the vegetables and protein. Previous to starting I hadn't ridden for about four years.

My ride took me up to the top of a pretty decent hill; the beginning is flat, maybe 15 mins getting to the hill, then it's 40 mins to the top. From there I just trace my route back, but push pretty hard, even when going down.

First month or so getting up the hill was punishment. But even after I got into better shape I still pushed myself just as hard (but got done faster). Actually, I had to do some flatter rides before going straight to the hill. Anyway, my point is that I pretty much went all out from the very beginning. That's how I was able to lose the weight so fast. I've never understood the "fat burning" rides business either. Guess my point is that the harder you push the faster you will lose. Everyone needs to manage their bodies needs though of course.