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KMID : 1211620100050010015
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Journal of the Korean Society of Physical Medicine
2010 Volume.5 No. 1 p.15 ~ p.24
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The Analysis of Center of Pressure(COP) Displacement under Loading Position during Walking
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Park Soo-Jin
Kim Jin-Sang
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Abstract
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Purpose : The purpose of this study was to investigate the effect of loading position on plantar center of pressure(COP) displacement when carrying a schoolbag during walking.
Methods : Forty-four normal subjects were randomly assigned to five groups according to the method of carrying a schoolbag. The carrying a schoolbag methods were classified into five conditions: no bag (condition 1), a backpack (condition 2), a shoulder bag (condition 3), a cross bag (condition 4), a one-hand bag (condition 5). COP displacement such as anteroposterior distance and mediolateral distance of COP were measured with F-scan system. The repeated one-way analysis of variance (ANOVA) and independent t-test were used to confirm the statistical significance.
Results : In the comparison of parameters of COP displacement between conditions, anteroposterior distance and mediolateral distance in the left foot and mediolateral distance in the right foot were not significantly different(p>.05), but anteroposterior diatance in the right foot was significantly different(p>.05). Between left and right foot, at condition 1 and 5 the mediolateral distance of COP was significantly different(p<.05) but anteroposterior distance at condition 1 and 5, anteroposterior distance and mediolateral distance of COP at condition 2, 3 and 4 were not significantly different(p>.05).
Conclusion : These findings showed that the various loading position by five types of carrying a schoolbag didn’t have influence significantly on COP displacement on during walking because of mechanism of postural adaption.
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KEYWORD
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Loading position, Carrying a schoolbag, COP displacement
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