Hip abductor neuromuscular capacity: A limiting factor in mediolateral balance control in older adults?
Hip abductor neuromuscular capacity: A limiting factor in mediolateral balance control in older adults?
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DOI：
10.1016/j.clinbiomech.2016.05.015
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发表时间：
2016-08-01
影响因子：
1.8
通讯作者：
Verschueren, Sabine M. P.
中科院分区：
文献类型：
--
作者：
Arvin, Mina;van Dieen, Jaap H.;Verschueren, Sabine M. P.
背景：内侧平衡障碍是老年人跌倒的重要原因。本研究旨在探讨髋外展肌肌力和/或位置感是否为内侧平衡控制的限制因素。方法：16名居住在社区的老年人执行三种不同的内侧重量转移任务，分别追踪(1)正弦运动的视觉目标“VISUAL-MELBA”；(2)没有明确视觉反馈的正弦平移平台“机械-MELBA”；以及(3)不可预测的平台平移“突然平台平移”。每个任务的平衡能力被量化，并与髋外展肌位置感、等长力量、最大髋外展/内收力矩和力矩速率相关。结果：平衡能力较好的参与者在任务中产生更高和更快的髋外展/内收力矩。等长髋外展肌力量与跟踪视觉目标的准确性显著相关，而髋外展肌位置感与机械目标可被跟踪的带宽相关，并且COM运动与突然平台运动之间的延迟较小。当明确的平衡视觉信息减少了对髋外展肌本体感觉的需求时，准确的平衡能力似乎受到较低的髋外展肌力量的限制，而当没有提供明确的增强反馈时，本体感觉敏锐度可能会限制平衡能力，并且所需的体重转移必须从“正常”的感觉信息中推断出来。(C)2016爱思唯尔有限公司。保留所有权利。
Background: Mediolateral balance impairment is an important cause of falling in older adults. We aimed to investigate whether hip abductor muscular strength and/or position sense are limiting factors in mediolateral balance control.Methods: Sixteen community-dwelling older adults performed three different mediolateral weight-shifting tasks, by tracking (1) a sinusoidally moving visual target, "visual-MELBA"; (2) a sinusoidally translating platform without explicit visual feedback, "mechanical-MELBA"; and (3) an unpredictable platform translation, "sudden-platform-translation." Balance performance was quantified for each task and correlated with hip abductor position sense, isometric strength, and peak hip abduction/adduction moments and moment rates.Findings: Participants with better balance performance showed higher and faster hip abduction/adduction moment production during the tasks. Isometric hip abductor strength was significantly correlated with accuracy of tracking the visual target, while hip abductor position sense was associated with the bandwidth over which the mechanical target could be tracked and with a smaller delay between CoM movement and the sudden-platform movement.Interpretation: Hip abductor muscles play an important role in mediolateral balance control. Accurate balance performance appears limited by lower hip abductor strength when explicit visual information on balance reduces the need for hip abductor proprioception, while proprioceptive acuity may limit balance performance when no explicit enhanced feedback is presented and required weight shifts have to be inferred from "normal" sensory information. (C) 2016 Elsevier Ltd. All rights reserved.