Effect of gait environment on veering index in gait assessment

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  • 歩行環境の違いが歩行評価におけるベアリングの指標にもたらす影響
  • ホコウ カンキョウ ノ チガイ ガ ホコウ ヒョウカ ニ オケル ベアリング ノ シヒョウ ニ モタラス エイキョウ

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Abstract

The aim of this study was to investigate the effect of differences between indoor and outdoor gait environments on veering indices in gait assessment. Eight blindfolded adults without visual impairments participated in the experiment. Their gait was assessed at a walking distance of 10 m. The walking task was performed under two conditions, indoors in a gymnasium and outdoors on athletic grounds, and the performance in the respective gait assessments was compared. The results suggested that the amount of veering（ Absolute Error） and variability（ Variable Error） in the three indicators of veering can be regarded as individual characteristics that are not influenced by the gait environment. Also, although there are individual differences in the directional bias （Constant Error）, some participants showed the same characteristics in the gymnasium condition and the outdoor ground condition. It is thought that gait can be assessed in detail by understanding the characteristics of the veering from the three indicators. In addition, the results of this study are consistent with the results of a previous study （Cratty & Williams, 1966） that conducted a similar analysis at a walking distance of 60 feet （about 18 m）. A walking distance of 10m is therefore considered sufficient to assess veering in people with visual impairments.

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