Figure 3. Average Weekday and Weekend Minutes of MVPA by Sex

MVPA indicates moderate-to-vigorous physical activity. Dotted horizontal line indicates the recommended 60 minutes per day of MVPA for children.¹⁰ Graphs were generated from estimates obtained from growth curve model 2, which included intercepts, age, sex, age x sex, and age x age to describe change in MVPA on weekdays and weekends between ages 9 and 15 years. Girls cross below the recommended 60 minutes of MVPA per day at approximately 13.1 years (95% CI, 12.9-13.3) for weekday activity and 12.6 years (95% CI, 12.3-12.8) for weekend activity; boys cross below the recommended 60 minutes of MVPA per day at approximately 14.7 years (95% CI, 14.3-15.3) for weekday activity and 13.4 years (95% CI, 13.2-13.7) for weekend activity.