I have to admit that when patients present with plantar fasciitis I fail to measure hamstring tightness as much as I should. This is a good reminder that plantar fasciitis been be shown to be associated with achilles tightness, with pronation, with obesity, and with tight hamstrings. It is important to stretch out the tight hamstrings when plagued with plantar fascial symptoms.
Liz, a nurse which used to work with me, discusses 7 principles of stretching while stretching the lower hamstrings.