Quantitative Assessment System for Gait of the Elderly Using a Portable Acceleration Monitor Device

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  • TAKENOSHITA Koyo
    Graduate School of Science and Engineering, Ritsumeikan University
  • NISHIYAMA Taketo
    Graduate School of Science and Engineering, Ritsumeikan University
  • KAWAGOE Masahiro
    Japan Medical Association Research Institute Department of Health Services Management and Policy, Kyushu University Graduate School of Medicine
  • MAKIKAWA Masaaki
    Faculty of Science and Engineering, Ritsumeikan University

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Other Title
  • 携帯型加速度モニタ装置を用いた高齢者の定量歩行評価システム
  • ケイタイガタ カソクド モニタ ソウチ オ モチイタ コウレイシャ ノ テイリョウ ホコウ ヒョウカ システム

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In this study, a handy gait assessment system with a tri-axial accelerometer has been developed and its application for quantitatively assessing the gait of elderly people was examined. This assessment system consists of a portable acceleration monitor device and analytical software capable of running on a personal computer. The portable device was fixed low on the front of the hip of the subject, and the subject was asked to walk around a test course at a voluntary speed. The activities performed on the test course included standing up, normal walking, fast walking, and walking over a barrier. The gaits of 402 elderly people were measured three times at three-month intervals. The subjects were participating in nursing health services, such as day service, ex-stroke patients, rehabilitation, fall prevention training, and pool training. The measured acceleration was converted into relative velocity and relative displacement of the center of gravity of the subject. Four evaluation indices (i. e. physical activity, stability, symmetry, and average speed) were calculated. The results reveal that both the physical activity and average speed decreased after six months of participating in nursing services.

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