Not really an answer to your question (but I'll say that when I had PF, my podiatrist didn't believe that I should stop running).

My recommendations: Solidly increase your intake of omega-3 fatty acids, whether through whole food or supplements. (They help reduce inflammation.) Deep massage is also good, but the golf-ball trick didn't work for me. Instead, what seemed to work is sitting in the hot tub and sticking the bottoms of my feet right against the spray jets.

DO make sure you get good running shoes, but DON'T spend money on custom orthopedic inserts. My podiatrist actually didn't recommend them, and in retrospect I think he tried to subtly steer me away from them, but he was willing to order them for me. They did nothing for me and I've heard from a number of sources that they're no better than the ones you can get from the foot care section of your pharmacy.