Table 1 Physical characteristics of the participants and time in physical activity and sedentary behavior during physical education lessons
All | Girls | Boys | |||||
|---|---|---|---|---|---|---|---|
Mean ± SD (n: 402) | 95% CI | Mean ± SD (n: 221) | 95% CI | Mean ± SD (n: 181) | 95% CI | ||
Age (years) | 9.2 ± 1.5 | 9.1–9.3 | 9.2 ± 1.5 | 9.0–9.4 | 9.1 ± 1.5 | 8.9–9.4 | |
Height (cm) | 131.5 ± 10.0 | 130.5–132.5 | 131.7 ± 10.7 | 130.3–133.1 | 131.2 ± 9.0 | 129.9–132.5 | |
Weight (kg) | 28.5 ± 6.8 | 27.8–29.1 | 28.1 ± 6.6 | 27.2–29.0 | 28.9 ± 6.9 | 27.9–29.9 | |
Body Mass Index (kg/m2) | 16.3 ± 2.2 | 16.0–16.5 | 16.0 ± 1.9 | 15.7–16.2 | 16.6 ± 2.4 | 16.2–17.0 | |
Relative body weight (%) | −2.8 ± 11.9 | −4.0--1.6 | −4.1 ± 10.7 | −5.5--2.7 | −1.3 ± 13.1 | −3.2-0.7 | |
Weight status (overweight and obese:%) | 19 (4.7%) | 5 (2.3%) | 14 (7.8%) | ||||
Weight status (thin:%) | 12 (3.0%) | 9 (4.1%) | 3 (1.7%) | ||||
PE (min/lesson) | (PE lessons: 714) | (PE lessons: 388) | (PE lessons: 326) | ||||
LPA | Non-ambulatory (min) | 11.3 ± 4.9 | 10.9–11.7 | 11.7 ± 4.8 | 11.2–12.2 | 10.9 ± 4.9 | 10.3–11.4 |
Non-ambulatory (%) | 25.1 ± 10.9 | 24.3–25.9 | 26.0 ± 10.8 | 24.9–27.0 | 24.1 ± 11.0 | 22.9–25.3 | |
Ambulatory (min) | 10.5 ± 4.5 | 10.2–10.8 | 10.2 ± 4.4 | 9.7–10.6 | 10.9 ± 4.7 | 10.4–11.4 | |
Ambulatory (%) | 23.3 ± 10.1 | 22.6–24.1 | 22.6 ± 9.8 | 21.6–23.5 | 24.2 ± 10.4 | 23.1–25.4 | |
Total (min) | 21.8 ± 5.3 | 21.4–22.2 | 21.8 ± 5.5 | 21.3–22.4 | 21.8 ± 5.1 | 21.2–22.3 | |
Total (%) | 48.4 ± 11.8 | 47.6–49.3 | 48.5 ± 12.2 | 47.3–49.8 | 48.3 ± 11.3 | 47.1–49.6 | |
MPA | Non-ambulatory (min) | 2.5 ± 2.1 | 2.4–2.7 | 2.5 ± 2.1 | 2.3–2.7 | 2.5 ± 2.0 | 2.2–2.7 |
Non-ambulatory (%) | 5.6 ± 4.6 | 5.2–5.9 | 5.6 ± 4.6 | 5.2–6.1 | 5.5 ± 4.5 | 5.0–6.0 | |
Ambulatory (min) | 7.2 ± 4.6 | 6.9–7.5 | 6.9 ± 4.3 | 6.5–7.4 | 7.5 ± 4.8 | 7.0–8.0 | |
Ambulatory (%) | 16.0 ± 10.1 | 15.2–16.7 | 15.4 ± 9.6 | 14.5–16.4 | 16.6 ± 10.6 | 15.5–17.8 | |
Total (min) | 9.7 ± 5.0 | 9.3–10.1 | 9.5 ± 4.8 | 9.0–10.0 | 9.9 ± 5.2 | 9.4–10.5 | |
Total (%) | 21.5 ± 11.1 | 20.7–22.4 | 21.1 ± 10.7 | 20.0–22.1 | 22.1 ± 11.6 | 20.8–23.4 | |
VPA | Non-ambulatory (min) | 0.7 ± 1.1 | 0.7–0.8 | 0.6 ± 0.9 | 0.6–0.7 | 0.8 ± 1.3 | 0.7–1.0 |
Non-ambulatory (%) | 1.6 ± 2.4 | 1.5–1.8 | 1.4 ± 2.1 | 1.2–1.6 | 1.9 ± 2.8 | 1.6–2.2 | |
Ambulatory (min) | 1.8 ± 1.8 | 1.7–2.0 | 1.8 ± 1.7 | 1.6–2.0 | 1.9 ± 1.8 | 1.7–2.1 | |
Ambulatory (%) | 4.1 ± 3.9 | 3.8–4.4 | 4.0 ± 3.8 | 3.6–4.4 | 4.2 ± 4.0 | 3.8–4.6 | |
Total (min) | 2.6 ± 2.4 | 2.4–2.8 | 2.4 ± 2.3 | 2.2–2.7 | 2.7 ± 2.6 | 2.5–3.0 | |
Total (%) | 5.7 ± 5.3 | 5.3–6.1 | 5.4 ± 5.0 | 4.9–5.9 | 6.1 ± 5.7 | 5.5–6.7 | |
MVPA | Non-ambulatory (min) | 3.2 ± 2.4 | 3.1–3.4 | 3.2 ± 2.4 | 2.9–3.4 | 3.3 ± 2.5 | 3.0–3.6 |
Non-ambulatory (%) | 7.2 ± 5.4 | 6.8–7.6 | 7.1 ± 5.3 | 6.5–7.6 | 7.4 ± 5.6 | 6.7–8.0 | |
Ambulatory (min) | 9.0 ± 5.5 | 8.6–9.4 | 8.7 ± 5.2 | 8.2–9.3 | 9.4 ± 5.9 | 8.7–10.0 | |
Ambulatory (%) | 20.1 ± 12.2 | 19.2–21.0 | 19.4 ± 11.5 | 18.3–20.6 | 20.8 ± 13.0 | 19.4–22.3 | |
Total (min) | 12.3 ± 6.1 | 11.8–12.7 | 11.9 ± 5.7 | 11.3–12.5 | 12.7 ± 6.4 | 12.0–13.4 | |
Total (%) | 27.3 ± 13.4 | 26.3–28.3 | 26.5 ± 12.7 | 25.2–27.8 | 28.2 ± 14.3 | 26.6–29.7 | |
Sedentary time (min) | 10.9 ± 7.8 | 10.4–11.5 | 11.2 ± 7.9 | 10.4–12.0 | 10.6 ± 7.6 | 9.7–11.4 | |
Sedentary time (%) | 24.3 ± 17.3 | 23.0–25.6 | 25.0 ± 17.5 | 23.2–26.7 | 23.5 ± 17.0 | 21.6–25.3 | |
Lower grade: 1st and 2st grade (n: 145) | Middle grade: 3rd and 4nd grade (n: 178) | Higher grade: 5th and 6th grade (n: 79) | |||||
Mean ± SD | 95% CI | Mean ± SD | 95% CI | Mean ± SD | 95% CI | ||
Age (years) | 7.6 ± 0.6 | 7.5–7.7 | 9.5 ± 0.6 | 9.4–9.6 | 11.4 ± 0.5 | 11.3–11.5 | |
Height (cm) | 122.5 ± 6.2 | 121.5–123.5 | 133.5 ± 6.3 | 132.5–134.4 | 143.5 ± 6.8 | 141.9–145.0 | |
Weight (kg) | 24.0 ± 4.9 | 23.2–24.8 | 29.2 ± 5.6 | 28.3–30.0 | 35.2 ± 6.1 | 33.8–36.5 | |
Body Mass Index (kg/m2) | 15.8 ± 2.0 | 15.5–16.2 | 16.3 ± 2.2 | 15.9–16.6 | 17.0 ± 2.1 | 16.5–17.5 | |
Relative body weight (%) | −0.8 ± 11.9 | −2.8 - 1.1 | −3.7 ± 12.1 | −5.4 - -1.9 | −4.5 ± 11.1 | −7.0 - -2.0 | |
Weight status (overweight and obese:%) | 7 (4.8%) | 10 (5.6%) | 2 (2.5%) | ||||
Weight status (thin:%) | 1 (0.7%) | 8(4.5%) | 3 (3.8%) | ||||
PE (min/lesson) | (PE lessons: 250) | (PE lessons: 324) | (PE lessons: 140) | ||||
LPA | Non-ambulatory (min) | 11.9 ± 5.1 | 11.2–12.5 | 11.0 ± 4.9 | 10.4–11.5 | 11.0 ± 4.3 | 10.3–11.7 |
Non-ambulatory (%) | 26.4 ± 11.4 | 25.0–27.8 | 24.4 ± 11.0 | 23.2–25.6 | 24.5 ± 9.5 | 22.9–26.1 | |
Ambulatory (min) | 10.5 ± 3.9 | 10.0–11.0 | 10.0 ± 4.7 | 9.5–10.5 | 11.6 ± 5.0 | 10.7–12.4 | |
Ambulatory (%) | 23.4 ± 8.6 | 22.3–24.5 | 22.2 ± 10.5 | 21.1–23.4 | 25.7 ± 11.2 | 23.8–27.6 | |
Total (min) | 22.4 ± 4.7 | 21.8–23.0 | 21.0 ± 6.1 | 20.3–21.7 | 22.6 ± 4.2 | 21.9–23.3 | |
Total (%) | 49.8 ± 10.4 | 48.5–51.1 | 46.6 ± 13.5 | 45.2–48.1 | 50.2 ± 9.4 | 48.6–51.7 | |
MPA | Non-ambulatory (min) | 2.8 ± 2.2 | 2.5–3.0 | 2.5 ± 2.1 | 2.3–2.8 | 2.0 ± 1.5 | 1.7–2.2 |
Non-ambulatory (%) | 6.1 ± 4.8 | 5.5–6.7 | 5.6 ± 4.7 | 5.1–6.2 | 4.4 ± 3.3 | 3.8–4.9 | |
Ambulatory (min) | 7.9 ± 4.7 | 7.4–8.5 | 6.7 ± 4.5 | 6.2–7.2 | 7.0 ± 4.4 | 6.2–7.7 | |
Ambulatory (%) | 17.7 ± 10.4 | 16.4–18.9 | 14.9 ± 10.0 | 13.8–16.0 | 15.5 ± 9.7 | 13.9–17.1 | |
Total (min) | 10.7 ± 5.0 | 10.1–11.3 | 9.2 ± 5.1 | 8.7–9.8 | 8.9 ± 4.6 | 8.2–9.7 | |
Total (%) | 23.8 ± 11.0 | 22.4–25.1 | 20.5 ± 11.3 | 19.3–21.8 | 19.9 ± 10.2 | 18.2–21.6 | |
VPA | Non-ambulatory (min) | 0.7 ± 0.9 | 0.6–0.9 | 0.8 ± 1.1 | 0.6–0.9 | 0.7 ± 1.4 | 0.4–0.9 |
Non-ambulatory (%) | 1.6 ± 2.1 | 1.4–1.9 | 1.7 ± 2.4 | 1.4–2.0 | 1.5 ± 3.0 | 1.0–2.0 | |
Ambulatory (min) | 2.0 ± 1.7 | 1.7–2.2 | 1.8 ± 1.8 | 1.6–2.0 | 1.8 ± 1.9 | 1.5–2.1 | |
Ambulatory (%) | 4.3 ± 3.7 | 3.9–4.8 | 4.0 ± 3.9 | 3.5–4.4 | 3.9 ± 4.1 | 3.3–4.6 | |
Total (min) | 2.7 ± 2.1 | 2.4–3.0 | 2.5 ± 2.4 | 2.3–2.8 | 2.4 ± 2.8 | 2.0–2.9 | |
Total (%) | 6.0 ± 4.7 | 5.4–6.6 | 5.7 ± 5.4 | 5.1–6.2 | 5.4 ± 6.3 | 4.4–6.5 | |
MVPA | Non-ambulatory (min) | 3.5 ± 2.5 | 3.2–3.8 | 3.3 ± 2.5 | 3.0–3.6 | 2.6 ± 2.0 | 2.3–3.0 |
Non-ambulatory (%) | 7.7 ± 5.6 | 7.1–8.4 | 7.3 ± 5.6 | 6.7–8.0 | 5.9 ± 4.4 | 5.1–6.6 | |
Ambulatory (min) | 9.9 ± 5.8 | 9.2–10.6 | 8.5 ± 5.4 | 7.9–9.1 | 8.7 ± 5.1 | 7.9–9.6 | |
Ambulatory (%) | 22.0 ± 12.9 | 20.4–23.6 | 18.8 ± 11.9 | 17.5–20.1 | 19.4 ± 11.4 | 17.5–21.3 | |
Total (min) | 13.4 ± 6.1 | 12.6–14.1 | 11.8 ± 6.0 | 11.1–12.4 | 11.4 ± 5.8 | 10.4–12.4 | |
Total (%) | 29.7 ± 13.6 | 28.1–31.4 | 26.2 ± 13.4 | 24.7–27.7 | 25.3 ± 12.8 | 23.2–27.5 | |
Sedentary time (min) | 9.2 ± 6.1 | 8.4–10.0 | 12.2 ± 9.1 | 11.2–13.2 | 11.0 ± 6.7 | 9.9–12.1 | |
Sedentary time (%) | 20.4 ± 13.5 | 18.8–22.1 | 27.2 ± 20.1 | 25.0–29.4 | 24.5 ± 14.8 | 22.0–27.0 | |