Comparison and validation of accelerometer wear time and non-wear time algorithms for assessing physical activity levels in children and adolescents

摘要

BackgroundAccelerometers are widely used to measure sedentary time and daily physical activity (PA). However, data collection and processing criteria, such as non-wear time rules might affect the assessment of total PA and sedentary time and the associations with health variables. The study aimed to investigate whether the choice of different non-wear time definitions would affect the outcomes of PA levels in youth.