 This is a randomized controlled trial RCT in osteoporosis patients randomized to standard parathyroid hormone PTH treatment alone or to standard PTH treatment and Whole-body vibration WBV. PTH is an effective but expensive anabolic treatment for osteoporosis. WBV stimulates muscles and bones. A combined treatment might have synergistic or additive beneficial effects on bone, reducing fracture risk making treatment more effective and cost-effective. A beneficial effect on muscles and thereby falls risk of WBV may improve fracture risk even further. 