I just wanted to share my experience with other sufferers - my consultant offered me hydrotherapy treatment for my PMR. I quickly realised the benefit of immersion in warm water so I joined a health club to enable me to swim regularly. Starting very gingerly at first I now swim for 20 mins 3 times a week & treat myself to a soak in the jacuzzi for another 10 mins. The improvement was immediately noticeable, my aches & pains just disappeared, but if I miss my swim I can feel the difference. So I advise others to take gentle exercise & if you don't have access to a nice warm pool & a jacuzzi just soak regularly in a nice hot bath.
I also found Devil's Claw to be a useful additon to the Prednisalone - it's available over the counter & allowed me to drop from 15mgs to 5mgs quite quickly. Holding steady.