Low bone mineral density (BMD) leads to metaphyseal fractures, which are considered of delayed, qualitatively reduced healing Christoph Wölfl 1 Laura Schuster2 resulting in prolonged care phases and increased socioeconomic costs. Bernd Höner3 Extracorporeal shockwave therapy (ESWT) is already approved to support Sarah Englert 1 bone healing of pseudarthrosis and delayed unions. With this study, we examined its influence on bone turnover markers (BTM) during fracture healing in patients with low and normal BMD.