Figure 2. Percentage of US High School Students Who Met the Aerobic Physical Activity and Muscle-Strengthening Guidelines, 2011-2015.

Source: Centers for Disease Control and Prevention, Youth Risk Behavior Surveillance System. Annual sample sizes ranged from 6599 (2013) to 6950 (2011) for boys and from 6448 (2013) to 7312 (2015) for girls. Meeting the aerobic component of the 2008 Physical Activity Guidelines for Americans for this population is defined as reporting at least 60 minutes of “any kind of physical activity that increases your heart rate and makes you breathe hard some of the time” on all days during the 7 days before the survey. Meeting the muscle-strengthening component is defined as reporting at least 3 days of “exercises to strengthen or tone your muscles” during the 7 days before the survey. Error bars indicate 95% CIs.