This was in the morning paper http://well.blogs.nytimes.com/2014/...d=nytcore-ipad-share&smprod=nytcore-ipad&_r=0
The study is not available to the public, but the specific details of the stretch were detailed in the NYT article:If you have stairs or a sturdy box in your home and a backpack, timely relief for plantar fasciitis may be possible, according to a new study of low-tech treatments for the condition.
But the new study, published in August in the Scandinavian Journal of Medicine & Science in Sports, finds that a single exercise could be even more effective. It requires standing barefoot on the affected leg on a stair or box, with a rolled-up towel resting beneath the toes of the sore foot and the heel extending over the edge of the stair or box. The unaffected leg should hang free, bent slightly at the knee.
Then slowly raise and lower the affected heel to a count of three seconds up, two seconds at the top and three seconds down. In the study, once participants could complete 12 repetitions fairly easily, volunteers donned a backpack stuffed with books to add weight. The volunteers performed eight to 12 repetitions of the exercise every other day.