I got a Torker electric trike at the end of August and I love it. It allows me to enjoy the outdoors and ride farther than I could otherwise. I discovered early in my disease that I could ride a bike farther than I could walk. However, at this point I could not ride more than a mile from my home or I would have trouble making it back. The Torker trike has an electric assist. You have to keep pedaling for the electric power to work, so it is very good for you,but helps you keep pedaling even if you are tired. It was expensive, but my bike shop had a financing option with no interest for 6 months. I am really glad to have it. I don't know how many rpms I do, but I know it is good for me and I feel better as soon as I start riding and feel the wind on my face. I am even able to ride on days I am not feeling well.