Leonhard Döderlein started his training in paediatric orthopaedic surgery as early as 1983 when he joined the Orthopaedic Hospital in Rummelsberg under Prof. Thom, who was specialized in the orthopaedic management of patients with poliomyelitis and cerebral palsy. Here he gained his decisive orthopaedic inputs that last until today. From 1986 until 1989 he worked in the Orthopaedic University Hospital in Freiburg where he established a special clinic for handicapped patients with special needs. From 1989 to 2007 he worked as a consultant surgeon in the Orthopaedic University Hospital in Heidelberg in the Department of Paediatric Orthopaedics where he was head of the Cerebral Palsy Section and Prosthetics and Orthotics. In Heidelberg he had been successful to introduce a 3D instrumented gait laboratory since 1995. This gait laboratory has been busy until today and works as a close cooperation of clinical and biomedical disciplines. The 1999 ESMAC meeting in Heidelberg had been organized together with the gait analysis team and was a quite successful event. From 2007 onwards he has been chief surgeon of the Paediatric Orthopaedic Hospital in Aschau, Germany, where he could continue his interest in combining movement analysis and clinical work. The gait lab in Aschau is a very active one. Its main research areas are pathologic muscle physiology, torsional problems and foot deformities and their effects on gait. Leonhard Döderlein´s main focus is still the integrated approach to gait disorders of neurologic and non-neurologic origins and he uses 3D gait analysis as an integral part of the treatment decision, may it be surgical or conservative, and control. His further interests are foot deformities and upper limb reconstruction. In his leisure time he enjoys family activities and he is a busy postal historian, a discipline which started as a simple stamp collector but then turned out to be another time consuming hobby.