THE RELATIONSHIP BETWEEN GROUND REACTION FORCE IN A SIT-TO-STAND MOVEMENT AND PHYSICAL FUNCTIONING, HISTORY OF FALLS, FEAR OF FALLING, AND MOBILITY LIMITATIONS IN COMMUNITY-DWELLING OLDER ADULTS

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  • TSUJI TAISHI
    <i>Graduate School of Comprehensive Human Sciences, University of Tsukuba</i>
  • MITSUISHI YASUHIRO
    <i>Graduate School of Comprehensive Human Sciences, University of Tsukuba</i>
  • TSUNODA KENJI
    <i>Graduate School of Comprehensive Human Sciences, University of Tsukuba</i>
  • YOON JI-YEONG
    <i>Graduate School of Comprehensive Human Sciences, University of Tsukuba</i>
  • KITANO NARUKI
    <i>Graduate School of Comprehensive Human Sciences, University of Tsukuba</i>
  • YOON JIEUN
    <i>Graduate School of Comprehensive Human Sciences, University of Tsukuba</i>
  • OKURA TOMOHIRO
    <i>Graduate School of Comprehensive Human Sciences, University of Tsukuba</i>

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Other Title
  • 地域在住高齢者を対象とした椅子立ち上がり動作時の地面反力と身体機能，転倒経験，転倒不安，起居移動動作能力との関連性
  • チイキ ザイジュウ コウレイシャ オ タイショウ ト シタ イス タチアガリ ドウサジ ノ ジメン ハンリョク ト シンタイ キノウ テントウ ケイケン テントウ フアン キキョ イドウ ドウサ ノウリョク ト ノ カンレンセイ

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Abstract

The vertical ground reaction force (GRF) parameters in a sit-to-stand movement are useful for measuring lower-limb muscle strength and power in older adults. The purpose of this study was to examine which GRF parameters would be more strongly associated with a person's physical functioning, history of falls, fear of falling and mobility limitations, all of which are known to be related to lower-limb muscle strength and power. We performed cross-sectional analyses on 363 community-dwelling older adults, which included 160 men and 203 women, aged 65-85 years (73.4 ± 5.3 years). Five parameters were measured: peak reaction force, two rate of force development and two time-related parameters. Their rate of force development was relatively higher correlated with results from timed “up and go” tests, standing times from a long sitting position and 4-way choice reaction times (partial r = -0.37 ∼ -0.52); these tests were accompanied with a dynamic movement of lower-limb; than their peak reaction force and time-related parameters. The rate of force development were poorer in subjects reporting falls, a fear of falling or a mobility limitation compared with those reporting no falls, fear of falling or mobility limitation. These results suggest that measuring the rate of force development in a sit-to-stand movement provide a better assessment of lower-limb muscle strength and power.

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