Sorry I am 34, 60 lbs overweight with lots of back issues. Recently my physical therapist said it was more my hips so he started pulling my legs out my hips and it has made a world of difference. During the week I try to get in 30 mins of riding. On the weekends I want to do a long ride. Today I did 10 miles and it wasn't bad but I think I will stay there til I am more comfortable doing more. Out of all the exercises riding has been the most enjoyable besides 80's aerobics. But I also see my form changing in just 2 wks. I have energy which I didn't before. It might be my mind but riding has been amazing so far.