The Effects of Terrain Variation on Intrinsic Foot Musculature in Healthy Individuals and Individuals With Plantar Fasciitis

Inclusion Criteria for Group A: * Patients presenting to the University of Florida Orthopaedics and Sports Medicine Institute with pain on the plantar medial or central heel for greater than 60 days with the following features * Pain upon palpation, or insidious pain onset * Pain accentuated after long periods of weight bearing activities or after periods of rest * A reduction in pain following light activities (McPoil et al., 2008) * Failure to respond to treatment modalities for 6 months, including plantar fascia and muscle stretching, nonsteroidal anti-inflammatory medication, supportive insoles, and night splints * Age \>18 years Inclusion Criteria for Group B: * Healthy individuals in the general population of Gainesville and surrounding areas * Age \>18 Exclusion Criteria for Group A: * History of lower leg or foot surgery, hindfoot trauma or fracture of the affected limb within the previous year. * Diagnosis of diabetic neuropathy, fibromyalgia, neurological disease, Achilles tendinopathy, metatarsalgia, tarsal tunnel syndrome or heel pad syndrome * Body Mass Index (BMI) \> 35 * Currently taking or applying any anti-inflammatory medication or medication to control nerve pathology, prescription or over the counter * Third trimester pregnancy Exclusion Criteria for Group B: * Any foot or lower limb pathology resulting in discomfort or gait limitation * Diagnosis of diabetic neuropathy, fibromyalgia, neurological disease * BMI \>35 * Currently taking or applying any anti-inflammatory medication or medication to control nerve pathology, prescription or over the counter * Third trimester pregnancy