Hi Gayle. There might be hope! I had a bad case of PF in both feet about 6 years ago. It came on after I started to really increase both my miles and the speed at which I ran. I wasn't able to run or do step (my two favorite cardio activities) and I was really bummed out thinking I would never be able to do them. I was able to do the elliptical, Cathe kickboxing, and weight lifting. The elliptical isn't as much fun as running IMO, but the workout intensity is comparable to running for me. Anyhow, I know you didn't ask for advice on how to cure PF, but here are the things I did.
1. I started wearing this thing called a Strassburg sock to bed each night. It's uncomfortable at first and takes some getting used to, but it really helps to stretch out the feet while you are sleeping.
2. Every night before I went to bed, I would take some of the really thick foot cream and massage my heels. I would really rub them hard (like a deep tissue massage). At first it would really hurt, but after a while it wouldn't hurt as much. I don't know if I was breaking up the scar tissue, or just loosing the fascia (or maybe some of both), but it helped.
3. After I did my heels, I would use The Stick to roll out my hamstrings and calves. I had soooo many knots in my calves. I don't think stretching my calves and hamstrings was enough. The stick really massages the muscles and loosens them up IMO.
4. After about a 3 month layoff from running or step, I started back up again, but I taped my feet first. I used 3 strips of tape and put them on the bottom of my foot from the heels to the ball of the foot, similar to this picture
http://heelspurs.com/tape.html. I used a type of tape called Hy-Tape. Any athletic tape will probably work though. If you PM me, I can mail you a couple rolls to try out. Taping my feet was a huge help in preventing the PF from coming back. It really helped to take the stress of the fascia. I probably used the tape for at least a year until I was sure the PF was gone.
5. I know everybody has their own preferred brand of inserts. I use the Spenco walker/runner type. I still use them to this day.
Hope these ideas help! Good luck.