I'm very envious that you're able to run. I had to give it up for the time being because the prednisone has made my muscles strain very easily. After having several strains in a short time I became concerned about doing permanent damage. I'm currently at 10 mg, and I'm hoping that the muscle problems will clear up as I taper more or else get off of prednisone. I'm a few months behind you on the taper. I'm interested to hear how you're taper is going. It sounds like your adrenal glands are slowly waking back up.