Table 3 Mean ± SD (and ranges) of frequency of posture changes of the school children recorded in one class period (n = 20 in each age group)
Age groups | ||||||
|---|---|---|---|---|---|---|
10 years | 11 years | 12 years | 13 years | 14 years | 15 years | |
Number (frequency) of posture change | ||||||
Neck lateral bend (right/left) | 13.0 ± 3.5 (7–19) | 11.5 ± 3.9 (4–18) | 7.7 ± 3.4 (2–13) | 9.6 ± 4.0 (1–17) | 11.7 ± 3.3 (7–19) | 10.9 ± 5.8 (2–28) |
Neck forward bend | 13.1 ± 3.9 (7–18) | 10.3 ± 4.6 (3–18) | 6.5 ± 3.6 (1–15) | 8.5 ± 4.8 (2–21) | 10.3 ± 3.3 (4–16) | 10.8 ± 4.3 (2–18) |
Trunk bend (forward and backward) | 13.0 ± 4.5 (5–20) | 13.3 ± 4.3 (5–20) | 10.2 ± 3.0 (5–16) | 9.8 ± 5.1 (1–24) | 11.8 ± 3.0 (7–19) | 10.1 ± 3.7 (4–19) |
Trunk lateral bend (right/left) | 12.7 ± 4.1 (5–21) | 6.7 ± 3.0 (1–12) | 6.8 ± 2.9 (2–11) | 6.8 ± 3.5 (1–13) | 7.8 ± 3.7 (2–14) | 6.6 ± 4.7 (1–18) |
Left leg bend (flexion and extension at knee joint) | 14.1 ± 4.8 (6–21) | 14.7 ± 4.9 (4–22) | 12.7 ± 4.0 (7–22) | 8.3 ± 2.5 (4–13) | 13.8 ± 5.4 (6–24) | 11.6 ± 4.5 (6–26) |
Right leg bend (flexion and extension at knee joint) | 13.8 ± 4.7 (6–22) | 13.9 ± 6.0 (4–23) | 12.7 ± 3.1 (7–19) | 8.6 ± 2.7 (4–14) | 13.9 ± 5.3 (6–24) | 11.7 ± 4.6 (6–26) |
Crossed leg condition | 12.3 ± 3.8 (6–20) | 10.9 ± 4.6 (4–19) | 9.0 ± 3.1 (2–14) | 6.9 ± 2.5 (3–10) | 5.0 ± 2.4 (2–11) | 4.9 ± 1.4 (2–10) |