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Table 2 Duration of physical activity, sedentary behavior and sleep behaviors through adolescence, by sex, Birth-to-Twenty Plus cohort, Johannesburg, South Africa

From: Longitudinal patterns of physical activity, sedentary behavior and sleep in urban South African adolescents, Birth-To-Twenty Plus cohort

  12 y 13 y 14 y 15 y 16 y 17 y
Any Q1a Q2 Q3 Any Q1 Q2 Q3 Any Q1 Q2 Q3 Any Q1 Q2 Q3 Any Q1 Q2 Q3 Any Q1 Q2 Q3
% Min/ wk Min/ wk Min/ wk % Min/ wk Min/ wk Min/ wk % Min/ wk Min/ wk Min/ wk % Min/ wk Min/ wk Min/ wk % Min/ wk Min/ wk Min/ wk % Min/ wk Min/ wk Min/ wk
Males N = 502 N = 669 N = 634 N = 640 N = 660 N = 640
 Informal physical activityb ---3 94 210 360 638 92 180 360 615 82 60 210 480 51 0 30 240 59 0 120 360
 Physical educationb 49 0 0 150 27 0 0 30 22 0 0 0 15 0 0 0 35 0 0 60 38 45 90 120
 Organized sportsb 84 46 186 383 81 37 138 355 66 0 92 300 46 0 0 245 41 0 0 138 43 0 0 174
 Walking to/from schoolb 76 10 150 250 75 0 150 250 81 50 150 250 87 50 150 200 77 20 100 200 70 0 100 200
 Sedentary behavior b 100 540 750 750 100 660 990 1500 100 660 990 1680 100 990 1470 1950 100 840 1335 2040 100 1050 1633 2310
 School-night sleepc 100 480 540 570 100 480 510 570 100 480 510 540 100 450 480 540
 Weekend sleepc 100 540 600 630 100 540 600 660 100 540 600 660 100 540 600 660
Females N = 578 N = 745 N = 705 N = 705 N = 735 N = 702
 Informal physical activityb 90 150 275 510 82 60 210 300 62 0 60 240 30 0 0 45 21 0 0 0
 Physical educationb 47 0 0 120 35 0 0 60 25 0 0 60 20 0 0 0 36 0 0 60 31 60 90 135
 Organized sportsb 73 0 55 149 69 0 55 148 49 0 0 94 15 0 0 0 26 0 0 9 22 0 0 0
 Walking to/from schoolb 72 0 150 263 72 0 150 300 75 10 150 300 78 30 150 300 67 0 100 200 57 0 70 225
 Sedentary behaviorc 100 540 780 1080 100% 750 1080 1680 100 660 1020 1680 100 1110 1740 2370 100 1020 1655 2340 100 1260 1950 2790
 School-night sleepc 100 480 510 540 100 450 510 540 100 459 510 520 100 420 480 540
 Weekend sleep4c 100 540 600 630 100 540 600 660 100 540 600 660 100 540 600 660
  1. 1Respondents reporting at least 1 min per week of specific behavior
  2. aQ1: 25th percentile; Q2: 50th percentile; Q3: 75th percentile
  3. bMinutes per week
  4. cMinutes per night
  5. -- Module not administered