Body placement of inertial measurement units differentially affects physical activity assessment accuracy in drug-naïve Parkinson’s disease

Abstract Parkinson’s disease (PD) affects physical activity, and physical activity reduces the burden of PD. Although shown in studies using inertial measurement units (IMU), it remains unclear at which position physical activity change can best be detected in this population. Within the FAIRPARK-II trial, a subgroup of 25 newly diagnosed persons with PD (pwPD) not taking disease-specific medication yet documented their physical activity and, in parallel, wore IMUs on the most affected ankle, wr