Anxiety-mediated gait adaptations reduce errors of obstacle negotiation among younger and older adults: Implications for fall risk
Anxiety-mediated gait adaptations reduce errors of obstacle negotiation among younger and older adults: Implications for fall risk
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DOI：
10.1016/j.gaitpost.2005.09.013
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发表时间：
2006-12-01
期刊：
影响因子：
2.4
通讯作者：
Cooper, S. A.
中科院分区：
文献类型：
--
作者：
Brown, L. A.;Doan, J. B.;Cooper, S. A.
这项研究的目的是确定焦虑介导的步态适应是否可以降低年轻人和老年人跌倒的风险。14名年轻人（23.14 +/- 3.08岁）和14名老年人（69.28 +/- 5.41岁）参加了本研究。参与者被要求步行7.20米的走道长度，并避免接触突然出现在25%或75%的步态周期持续时间的障碍物。测试在四种姿势威胁条件下进行。障碍物呈现为光束，并且在接触时不会危及平衡。跌倒风险是从接触障碍物的频率推断出来的。我们的研究结果表明，障碍物接触频率下降时，保守的步态模式出现。这些研究结果表明，焦虑介导的步态适应有利于降低老年人跌倒的风险，并提出了害怕跌倒可能为姿势控制提供保护性益处的可能性。一种可能性是，焦虑的有益影响只能在不害怕摔倒的老年人中实现。(c)2005 Elsevier B. V.保留所有权利。
The purpose of this study was to determine if anxiety-mediated gait adaptations can reduce the risk for falling among younger and older adults. Fourteen younger adults (23.14 +/- 3.08 years) and 14 older adults (69.28 +/- 5.41 years) participated in this study. Participants were asked to walk the length of a 7.20 m walkway and avoid contact with an obstacle that appeared suddenly underfoot at either 25% or 75% of the gait cycle duration. Testing was conducted in four conditions of postural threat. The obstacle was presented as a light beam and did not jeopardize balance when contacted. Fall risk was inferred from the frequency of obstacle contacts. Our findings indicated that obstacle contact frequency decreased when conservative gait patterns emerged. These findings imply that anxiety-mediated gait adaptations are beneficial in reducing the risk for falling among older adults and present the possibility that fear of falling may offer protective benefits for postural control. One possibility is that the beneficial effects of anxiety can only be realized among older adults who do not fear falling. (c) 2005 Elsevier B.V. All rights reserved.