There is a wonderful organization called JDRF (juvenile diabetes research foundation) which has tons of training information for diabetics. The training info has nothing to do with age. They also have several fund raising rides and walks every year. I participated in the ride in asheville north carolina this month. It was fabulous. I rode 68 miles in the smokey mountains. Gorgeous! The support for diabetics was terrific. Special lectures on managing your sugar while exercising etc. Even though their focus is type I diabetes, I am sure most of the information on training will be applicable to you. You can find them easily at jdrf.org (i think. if not they will pop up if you use a search engine) Good luck!