Effects of backpackloads on posture health of school-age children / 中国学校卫生

ABSTRACT

Objective@#To investigate the effects of backpackloads on forward cervical spine posture of school-age children and to provide a reference for healthy body shape.@*Methods@#Forty children aged 4-6, 7-9, 10-12 and 13-15 years were selected and randomly assigned into four groups receiving different backpack loads. Vicon infrared was used the high-speed motion capture system collects spatial coordinate data.@*Results@#The results showed that the mean value and variance of shoulder balance, hip balance and cervical spine forward angle were all higher than that of no-load state, there are significant differences among different backpack loads(P<0.05). In addition, with the increase of age, the impact of backpack on the shoulder balance of children in walking state decreases gradually,Kindergarten[(0.15±0.35)rad] was higher than the young age of primary school[(0.07±0.01)rad], the advanced age of primary school[(0.03±0.00)rad] and junior middle school[(0.01±0.00)rad], while the hip balance ability does not show a decreasing trend with the increase of age, junior middle school[(0.10±0.11)rad] was higher than the young age of primary schooll[(0.10±0.06)rad],Kindergarten[(0.10±0.01)rad] and the advanced age of primary school[(0.10±0.00)rad]. The impoct on neck posture depended on the young age of primary schooll and the advanced age of primary school, Kindergarten[(0.32±0.26)rad] was higher than junior middle school [(0.24±0.12)rad], showing a decreasing trend, but the affected degree of neck posture is obviously higher than the other two.@*Conclusion@#The primary goal of children’s backpack carrying health is to protect cervical vertebra by changing the design of children’s backpack.