Figure 1

Study design notes: n = number of preschools, N = number of chlidren, PA (physical activity), Measurement: accelerometry and heart rate measurement over 6 days, SES = aggregate socioeconomic status.
Study design notes: n = number of preschools, N = number of chlidren, PA (physical activity), Measurement: accelerometry and heart rate measurement over 6 days, SES = aggregate socioeconomic status.