Methods/Design: Pragmatic cluster-randomized controlled trial comparing two intervention groups ((1) updated original programme and (2) brief version of the updated programme) with a control group (3) receiving printed study materials (optimized usual care). Intervention (1) consists of an information programme for all nurses, additional training and structured support for nominated key nurses, and provision of printed study material and other supportive material. For intervention (2) nurses' training is only optional carried out facultatively by key nurses who have received an additional train-the-trainer module. The control group (3) receives printed study material only. Overall, 120 nursing homes including approximately 10800 residents will be recruited, randomized to one of the three groups and followed up for 12 months. The primary outcome is defined as proportion of residents with at least one physical restraint at 12 months. Physical restraint use will be assessed by direct observation. Secondary outcomes are residents` quality of life as well as safety parameters as i.g. falls and fall-related fractures. Process and cost measures will also be assessed.