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Work. 2015;52(1):203-9. doi: 10.3233/WOR-152043.

Backpack carriage effect on head posture and ground reaction forces in school children.

Author information

1
Department of Basic sciences, Faculty of Physical Therapy, Cairo University, Giza, Egypt.
2
Department of Biomechanics, Faculty of Physical Therapy, Cairo University, Giza, Egypt.

Abstract

BACKGROUND:

Carrying the school bag may lead to forward leaning of the head and trunk which may result in spinal deformities.

OBJECTIVE:

The purpose of this study was to evaluate the effect of carrying a backpack on neck angles and ground reaction forces (GRFs) in children.

METHODS:

3-D motion analysis system, with a force plate, was used to examine the effect of carrying backpack on neck angles and GRFs of thirty children with mean age (10.06 ± 1.31 years), mean weight (34.56 ± 6.9 kg), and mean height (138.63 ± 9.82 cm). The unloaded posture was compared with posture when carrying a backpack. The static test was used to assess the three angles of the neck, and the dynamic test was used to assess the GRFs.

RESULTS:

There were no significant differences in the craniohorizontal angle and shoulder sagittal posture between carrying backpack and without backpack (p = 0.153 and 0.272) respectively. There was a significant decrease in the craniovertebral angle in carrying backpack than without backpack (p = 0.032). There was a significant increase in GRFs values in carrying backpack than without backpack (p < 0.032).

CONCLUSION:

Carrying backpack with a load 7.5% of the child's body weight alters the head posture and GRFs values.

KEYWORDS:

Children; ground reaction forces; load carriage; neck angles

PMID:
26410235
DOI:
10.3233/WOR-152043
[Indexed for MEDLINE]

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