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- Oshita Kazushige
- Department of Sports Science, Faculty of Sports Science, Kyushu Kyoritsu University Graduate School of Human Development and Environment, Kobe University
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- Yano Sumio
- Graduate School of Human Development and Environment, Kobe University
書誌事項
- タイトル別名
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- Low-frequency Force Steadiness Practice in Plantar Flexor Muscle Reduces Postural Sway during Quiet Standing
- コトナル ホチョウ オヨビ ハキモノ ニ オケル ユカ ハンリョク スイテイ インソール ノ セイノウ ヒョウカ
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The purpose of this study was to assess the effect of low-frequency force steadiness practice in the plantar flexor muscles on postural sway during quiet standing. Healthy young 21 men (21±1 yrs) were randomly assigned to a practice group (n=14) and a nonexercising control group (n=7). Practice groups were divided by frequency of practice: 7 participants practiced once a week, and the other 7 twice a week, for 4 weeks. Steadiness practice required practice group to 5 sets of 60-s contraction at levels corresponding to 10% and 20% maximal voluntary contraction (MVC) in the plantar flexor muscles. The 4-week-long practice period reduced the force fluctuations (assessed as the standard deviation (SD) of the outputted force during steady isometric plantar flexion) and postural sway (assessed as SD of the center of mass velocity during quiet standing). However, these practice effects were not significantly affected by the practice frequencies (1 vs. 2 sessions per week) examined in this study. Further, a linear regression analysis revealed the association between prepractice postural sway and the relative change in postural sway by the practice (r=−0.904) in the practice group. These results suggest that the steadiness practice in plantar flexor muscles improves postural stability during quiet standing, even though the practice is low-frequency (once a week) and low-intensity (within 20% MVC). These practice effects are dependent on prepractice postural stability. Further, the present results have provided the functional significance of force fluctuation in lower limb muscles.
収録刊行物
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- Journal of PHYSIOLOGICAL ANTHROPOLOGY
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Journal of PHYSIOLOGICAL ANTHROPOLOGY 30 (6), 233-239, 2011
日本生理人類学会
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詳細情報 詳細情報について
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- CRID
- 1390282680232612096
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- NII論文ID
- 10030022837
- 130004494228
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- NII書誌ID
- AA11633569
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- ISSN
- 18806805
- 18814379
- 18806791
- 1347443X
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- NDL書誌ID
- 025613629
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可