This study was designed to determine the efficacy of different non-surgical interventions in clients with symptomatic dysfunction of the posterior tibialis tendon. All 36 subjects had been classified into Stage I or Stage II. Stage I and II exhibit progressive levels of medial foot pain, localized edema, and the ability to perform a heel raise (with some possible level of pain). Flattening of the arch occurs in Stage II. Subjects were excluded if there was any rigid foot deformity. Subjects were randomly assigned to one of three groups. Each group wore a foot orthosis to support the foot and reduce collapse during weightbearing. Two groups also completed an exercise program, one with concentric exercise, and one with eccentric exercise.