The aim of this study is to evaluate PTH with vibration in a group of individuals with chronic SCI and loss of bone mass in their lower extremities. A convenience sample of 60 subjects with SCI will be enrolled into a 12 month study assessing the effects of PTH (20 ug/day) and vibration (10 min/day) individually or in combination on BMD and bone markers. Subjects will be evaluated at 3, 6, 9, and 12 months after initiating treatment with measurement of bone density as well as bone markers of formation and resorption.
