Bony deformities, e.g. increased or decreased femoral anteversion and neck-shaft angle, can lead to pathological gait patterns, altered joint loads, and degenerative joint diseases. The mechanism how bony geometries influence muscle forces and joint load during walking is still not fully understood. The aim of this project is to comprehensively investigate the influence of bony geometries on muscle forces and joint loads during walking. Furthermore, we will investigate reasons for pathological gait and evaluate the influence of clinical interventions on the patient-specific gait pattern and musculoskeletal loading.