I developed high hamstring tendinopathy mid-late last season and have now been off the bike for 4.5 months trying to let it heal, and working with docs to treat it. now that we finally know what is going on (don't ask me why it took so long), we are going to start prolotherapy+PRP on the proximal hamstring tendon.
The idea of the treatments is to kick the healing response back on in the tendon, since that response is long gone from the initial injury. The doc said not to physically stress the hamstring too much during the treatments (the physiological stress of the healing response is ok, but mechanical stress is not helpful), so I am trying to figure out if there is a best cardio exercise I can do to avoid losing the little bit of fitness I have left at this point, and to make my eventual comeback easier.
I thought maybe an expert here would have a better idea of what kind of cardio (stair stepper, eliptical, etc) would stress the hamstring the least.