This is something of a legend that happened in Australia where a footballer with a chronic plantar fasciitis allegedly jumped from a height in order to rupture his plantar fascia to facilitate healing. A surgical cutting of the plantar fascia is often used to treat chronic plantar fasciitis. It apparently worked.
Most Useful Resources:
Deliberate Rupture of Plantar Fascia to Treat Plantar Fasciitis (PodiaPaedia)
Rupture the plantar fascitis to help? (Podiatry Experts)
Deliberate rupture of plantar fasica to treat plantar fasciitis (Podiatry Arena)