Thanks for all the replies! I live in Clayton, Mo btw

My goal for muscle is more definition. When focusing on weightlifting I can go pretty heavy, and could probably go heavier but I never really look that cut. So I've been trying a differant way to work the muscles for the last 4 months or so. I don't need to lose weight, if I could lose a little bit of that last layer of fat and turn it into muscle that would be great, but I've found that unless I can devote everyday without fail to exercising that is probably not going to happen, I am a very busy mom of two. I'm 5'1" and 115, with a medium build. I've never really weighed less than that unless you count my freshman year of highschool What is frustrating is the layer of fat on my legs, that I like all women want to get rid of. Anyway I feel like my leg muscles are really being challenged in a good way with biking, differant than my other experianes in exercising. I really seem to feel it in my butt, quads and hamstrings - that is a good feeling!

I'll have to try the spinning downloads, that sounds like maybe where I should go along with a class.

Btw I'm biking like 13.5 miles in 1 hour at around 90 RPM, is that a beginner amount of miles? What is a long bike ride indoors?