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Exerc Sci > Accepted Articles
Effects of sitting habits and physical activity levels on spine and pelvis deformations in school children
Munku Song1, Jiyoung Gong1, Jihyun Park2, Chulho Shin3, Hyunsik Kang1
1College of sport science, Sungkyunkwan University, Suwon, Korea
2Graduate School of Physical Education, Kyunghee University, Yongin, Korea
3Department of Sports and Health Care, Namseoul University, Cheonan, Korea
Correspondence  Hyunsik Kang , Tel: 031-299-6923, Fax: 031-299-6942, Email: hkang@skku.edu
Received: October 19, 2016;  Accepted: December 23, 2016.  Published online: December 23, 2016.
This study investigated the association between the modifiable risk factors and spinal deformations in children.
Children (152 boys, 153 girls) were recruited to participate in the study. Physical activity level, sitting time, and posture were assessed with a questionnaire. Spinal parameters such as scoliosis angle (SA), pelvic oblique (PO), and pelvic torsion (PT) were measured with the Formetric 4D. Children were classified as uncrossed and cross-legged sitting groups according to postures, as sedentary, moderately-active, and highly-active groups according to physical activity levels, and as low, mid, and high groups according to sitting time. Logistic regression was used to determine the odds ratio (OR) and 95% confidence interval (95% CI) of pelvic deformations.
Children with cross-legged sitting posture had significantly higher values in SA and PO than children with uncrossed sitting posture. Significant differences in SA, PO, and PT were found between the activity-based subgroups and a significant difference in PT between the sitting time-based subgroups. Compared with uncrossed sitting children (reference, OR=1), cross-legged sitting children had a significantly risk (OR=3.153, 95% CI=1.707-5.822) of PO deformation. Compared with highly active children (reference, OR=1), sedentary children had a significantly higher risk (OR=4.115, 95% CI=1.496-11.321) of PO deformation. In addition, moderately-active and sedentary children had significantly higher risks (OR=3.987 and 95% CI=2.044-7.777 and OR=5.806 and 95% CI=2.675-12.601, respectively) of PT deformation as compared with highly-active children (reference, OR=1).
The current findings suggest that crossed-legged sitting posture and decreased physical activity are two of modifiable risk factors for spinal deformations in children.
Key words: children; physical activity; sitting posture; pelvic deformation; spinal deformation
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