I am a medical doctor and scientist specialized in Orthopaedic Surgery, Physiology, Sports- and Emergency Medicine. My main field of research is the musculoskeletal system in spaceflight, immobilisation and ageing, and I am involved in studies with DLR (the German Space Agency), ESA and NASA. I am currently affiliated with Manchester Metropolitan University in the UK, where I work with a DFG (German Research Foundation) research fellowship grant. In addition, I am a human centrifuge-doctor at DLR, and I teach Space Medicine at RWTH Aachen University. This website is about my research, books and what is going on!