Keppler AM, Holzschuh J, Pfeufer D, et al. - Given the beneficial effects of early postoperative mobilization in terms of complications and long-term mobilization scores in elderly adult fracture patients, researchers here investigated orthogeriatric patients during the postoperative hospital stay for the overall mobilization based on a continuous accelerometry measurement. Further, fracture-related differences were assessed in the collected data. In a maximum care hospital, this work with prospective study design (level of evidence 2) included 31 orthogeriatric patients with proximal femur fractures (PFF) and proximal humerus fractures (PHF). In the PFF study group, nine patients had undergone hip arthroplasty and 11 patients had undergone intramedullary nailing (PFNA) and in the PHF group, 10 patients had undergone osteosynthesis of the proximal humerus. A waist placed accelerometer was worn by all participants during the length of hospitalization to quantify mobilization and physical activity. Data illustrate that the patients find it feasible and acceptable to continuously measure the mobility including gait speed and characteristics of orthogeriatric patients utilizing waist-worn accelerometry based wearables. Both groups generally exhibited low postoperative mobility and gait speed. These findings highlight the urgent necessity for actions to improve the postoperative mobility of orthogeriatric patients.