Physical activity level by age and sex, according to different activity metrics. a Total physical activity (accelerometer counts per minute); b Percentage time in Moderate to Vigorous Physical activity (MVPA); c Percentage time in light intensity physical activity; d Percentage time sedentary. CI = confidence interval, cpm = counts per minute. In all graphs, boys aged 5–6 are the reference population. All graphs present mean differences in physical activity variables, adjusting for study population and season.