Table 3: Prevalence of participation in daily physical activity (DPA), vigorous physical activity (VPA), muscle-strengthening activity (MSA), television (TV) viewing, and computer or video game (C/VG) use, by demographic and BMI category among US high school students.

Categorical variableDPAVPAMSATVC/VG
% (95% CI)% (95% CI)% (95% CI)% (95% CI)% (95% CI)

Sex
 Male21.7 (19.3, 24.4)78.1 (76.1, 80.0)64.4 (60.8, 67.9)26.4 (24.0, 29.0)27.6 (25.4, 30.0)
 Female 8.4 (7.3, 9.5)61.2 (58.1, 64.2)36.6 (34.1, 39.1)30.2 (26.9, 33.8)19.2 (17.4, 21.3)
Chi Sq, 1 df ( value)(0.0000)(0.0000)(0.0000)(0.0193)(0.0000)

Race/ethnicity
 White17.0 (15.6, 18.4)72.3 (70.0, 74.5)51.3 (48.4, 54.3)20.6 (18.3, 23.2)20.6 (18.7, 22.6)
 Black14.1 (12.0, 16.4)65.1 (61.7, 68.4)47.5 (44.3, 50.6)52.7 (50.0, 55.5)31.5 (28.0, 35.3)
 Hispanic11.9 (8.9, 15.7)66.8 (62.4, 70.9)52.2 (48.2, 56.2)33.7 (31.6, 35.9)23.4 (19.9, 27.3)
 Other12.4 (8.7, 17.5)67.5 (60.8, 73.6)48.4 (42.6, 54.3)24.8 (18.3, 32.7)29.5 (25.7, 33.5)
Chi Sq, 3 df ( value)(0.0051)(0.0001)(0.1664)(0.0000)(0.0000)

Grade
 9th grade18.0 (15.5, 20.8)74.5 (69.8, 78.7)55.6 (50.5, 60.5)28.7 (25.2, 32.5)23.4 (20.5, 26.5)
 10th grade15.4 (13.7, 17.4)72.5 (69.7, 75.1)51.1 (48.0, 54.2)30.4 (26.7, 34.4)24.4 (21.9, 27.2)
 11th grade13.7 (11.8, 15.9)67.5 (64.9, 70.1)48.9 (44.4, 53.4)24.7 (21.5, 28.3)23.2 (20.2, 26.5)
 12th grade12.7 (10.9, 14.8)63.0 (59.9, 66.0)45.8 (43.0, 48.6)28.9 (25.2, 33.0)22.8 (20.9, 24.8)
Chi Sq, 3 df ( value)(0.0169)(0.0000)(0.0024)(0.0274)(0.3173)

BMI category
 Underweight/normal (<85th percentile)16.2 (14.4, 18.2)70.5 (68.2, 72.8)52.3 (49.5, 55.0)26.0 (23.2, 29.0)23.6 (21.7, 25.5)
 Overweight (≥85th to <95th percentile)16.3 (13.3, 19.8)70.0 (66.4, 73.4)51.0 (46.6, 55.4)29.6 (26.1, 33.4)22.1 (19.8, 24.7)
 Obese (≥95th percentile)10.6 (8.2, 13.6)67.8 (64.8, 70.7)45.5 (42.1, 49.0)35.1 (31.4, 38.9)25.2 (21.7, 29.0)
Chi Sq, 2 df ( value)(0.0002)(0.1851)(0.0012)(0.0001)(0.1470)

DPA: daily physical activity (≥60 min/day, 7 days/wk); VPA: vigorous physical activity (≥20 min/day, ≥3 days/wk); MSA: muscle strengthening activity (≥3 days/wk); TV: television (≥3 hrs/day); C/VG: computer or video games (≥3 hrs/day); BMI: body mass index = weight (kg)/height (m)2 (based on measured height and weight, using age- and sex-specific percentiles from growth charts developed by Centers for Disease Control and Prevention).