621 年齢,転倒経験,ステップ幅が連続ステッピング動作時の重心動揺に及ぼす影響(傷害解析・予防,OS-7 ヒューマンダイナミクス,総合テーマ「伝統を,未来へ!」)
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This study examined how performance of rapid stepping task related to selected measures of balance and muscle strength. Healthy young (n=10, mean age=23 years) and elderly males (n=28, mean age=65 years) tested in their ability to take a maximal step to the front, back, and side for each foot (maximum step length (MSL)) and ability to take consecutive rapid steps in the three directions. Target step lengths during the rapid stepping were set to 80%, 70%, or 60% of MSL. Time to complete the rapid stepping and the total length of center of pressure during the test were measured. Balance and strength were studied with peak isometric knee-extension strength, the Functional Reach Test, and 1-legged stance time with eyes close. As a result, we found 1) MSL and performance of the rapid stepping significantly differed between the young and elderly groups, 2) performance of the rapid stepping at any step length did not have significant relationships with any selected measures of balance and strength for the young and elderly groups, 3) performance of the rapid stepping did not differ between elderly fallers and elderly non-fallers, and 4) MSL to the front and side had significant relationships with the knee-extension strength for the elderly group. These results indicate that MSL might be possible to predict knee-extension strength and fall risk for elderly, although performance of the rapid stepping might not.
- 一般社団法人日本機械学会の論文
- 2010-09-14
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