The Influence of the Schoolbag on Standing Posture of First-Year Elementary School Students

Ivan Jurak, Ozren Rađenović, Filip Bolčević, Andreja Bartolac and Vladimir Medved
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Ivan Jurak: Department of Physiotherapy, University of Applied Health Sciences, 10000 Zagreb, Croatia
Ozren Rađenović: Department of Occupational Therapy, University of Applied Health Sciences, 10000 Zagreb, Croatia
Filip Bolčević: Faculty of Kinesiology, University of Zagreb, 10000 Zagreb, Croatia
Andreja Bartolac: Department of Occupational Therapy, University of Applied Health Sciences, 10000 Zagreb, Croatia
Vladimir Medved: Faculty of Kinesiology, University of Zagreb, 10000 Zagreb, Croatia

IJERPH, 2019, vol. 16, issue 20, 1-13

Abstract: The purpose of this study was to determine the influence of the mass of a schoolbag on standing posture in first-year elementary school children. First-year elementary school students ( n = 76) participated in this study. The data was digitized and analyzed using SkillSpector and Kinovea. Results have shown a change of Center of Gravity (COG) position in all three anatomical planes ( p < 0.01), as well as a change in two out of three measured postural angles—craniovertebral ( p < 0.01) and craniocervical ( p < 0.01) angle. The most important aspect of changed posture, anterior shift of COG, was measured to be 2.4 cm and was in moderate negative correlation with student body mass (−0.4, p < 0.01) and height (−0.4, p < 0.01) when students were encumbered with a schoolbag weighing 16.11% of their body mass, on the average. Also, this study confirms that when encumbered, students’ head posture shifts to a more protracted position.

Keywords: center of gravity shift; anterior pelvic tilt angle; craniovertebral angle; craniocervical angle; kinematics (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
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