In some states (like Arizona) you can deduct some of the cost of devices that are deemed medically necessary by your doctor from your state income taxes. So in past years I have gotten script(s) from my neurologist for:

--recumbent tricycle
--a tall drafting chair (since I have bad akathesia and must stand or perch in front of the computer)
--gym membership
--massage therapy

My tricycle is my main form of exercise. I can no longer walk farther than about half a block before i get dystonia in my left foot. And while I still get foot dystonia while riding my trike, I can keep riding even with the dystonia.

PS I just reread the original post - I definitely need to pedal faster!!!