I had pulled my right hamstring in training and did too much plyometric work and stair runs on concrete while recovering from this injury for my left...
As described in my message above: Stretching with the help of the sock and the stretch I described and intrinsic foot strengthening. That’s how I got...
It’s unlikely that plantar fasciitis will heal to the point that you can sprint again without therapy. I found a Strasburg sock to be quite helpful....