Association of BMI category with change in children’s physical activity between ages 6 and 11 years: a longitudinal study

To examine the association of body mass index (BMI) with change in children's physical activity and sedentary time between ages 6 and 11.A total of 2132 children participated from 57 schools in Southwest England, from the B-PROACT1V study.Mean minutes of MVPA and sedentary time per day were derived from accelerometer-based measurements at ages 6, 9 and 11. Linear multilevel models examined the association of BMI categories with MVPA and...