I would just like to add that in addition to having lost 20 pounds many years ago wen I first started getting serious about mountain biking, it comes with several more very critical health perks. I am now 65 and still ride over 2000 miles a year. I had my annual physical recently and my doctor, who I have had for over ten years, was very impressed that i still have maintained my weight lose, my heart and lungs are in great shape, I am on no meds and my balance, and stamina are remarkable.
I contribute most of these results exclusively to riding my bikes. The more you ride the longer you will be able too.