Plantar fasciitis is almost nonexistent in populations of people who ARE USED TO going without shoes year-round. Let that sink in. What that means is that people maintain healthier, more tear-resistant muscles & tendons when they have gone barefoot on a regular basis. Thinking that shoes are the long-term solution is part of the problem. They can be a short-term solution to provide support while tendons get thicker from more collagen, but the long-term solution is to strengthen the muscles & tendons from knees to toes including the plantar fascia. PF is rare in sprinters and more common in distance runners. Why? because sprinters regularly strengthen the lower legs and feet, whereas distance runners who do not go barefoot in reasonable amounts or do speedwork tend to have weaker feet that lead to PF. Healing PF takes weeks to months, since tendon closer to bone (where PF typically is) has less blood supply (ie less oxygen and nutrients to heal, so healing is slower) and at Quigley's stage of life it can take about 4 weeks to 3 months to strengthen through the gradual process of adapting to physical therapy exercises and EVENTUALLY (but not rushing it) walking and then running barefoot on sand. In coaching over 42 years, I had runners use the long/triple jump landing pits' sand to prevent foot & lower leg problems. (Sessions 3 days apart: 5min walk 3 diff days in 1st 9+ days, then 5 min jog 3 diff days in next 9+ days, then increase time spent doing this, then increase speed gradually.) As a start, a PF-injured seated athlete can get low levels of resistance to start strengthening PF & a variety of supportive muscles and tendons from knees to toes by putting their bare feet in a basin with sand and moving the feet in various directions within the sand. Eventually they will be "gripping" the sand and eventually standing, then walking barefoot on soft supportive surfaces like soft earth, sand, or safe grassy areas that have soft earth beneath (not rocks!). Remember, muscles and tendons do not work in isolation; they work as an interdependent system. I wrote info for Bill Rodgers at his request to help him rehab his chronic achilles tendinitis at age 51 in 2001 and he became able to run again without the debilitating cycle of injury, pain, disuse from rest, then further atrophication. He got out of that cycle by strengthening gradually and going barefoot. Ask him. In 2002 or 2003, Bill said in an interview, "You need to get out on uneven surfaces and run barefoot." The process of adaptation needs to be gradual so that you don't reinjure. Some of the stresses that cause achilles tendinitis (stretching across the heel area) are also involved in PF. I would think that "Quigs" has access to good physical therapy expertise, she is smart, focused, and motivated, so she has very good chances of overcoming the PF. Last thing: self-palpation, or pressing on, in, & around an area, helps the athlete get feedback on the progress of healing as the days and weeks go by. I had PF in my 20's and totally kicked it by rehabbing it gradually. Slow mileage without enough foot strengthening was the cause, not change of shoes. Shoes can be "the straw that breaks the camel's back" when there is insufficient strength in the feet & lower legs.