Accurate assessment of range of motion of the first metatarsophalangeal joint may assist the physical therapist when dealing with plantar fasciitis. The purpose of this study was to determine whether there is any difference in the amount of flexion and/ or extension at the first metatarsophalangeal joint in runners with plantar fasciitis. Bilateral active and passive range of motion values at the first metatarsophalangeal joint were measured with a goniometer on six subjects with plantar fasciitis and six subjects without the pathology while their leg was stabilized at the ankle and forefoot in an adapted orthosis. The results indicate a statistically significant decrease in active extension, passive extension, and passive flexion in runners with plantar fasciitis. Due to the loss of stability in the medial longitudinal arch which accompanies decreased extension range of motion at the first rnetatarsophalangeal joint, specific evaluation of this joint is needed when the physical therapist is treating a patient with plantar fasciitis. J Orthop Sports Phys Ther 1987;8(7):357-361.