Hip and Trunk Muscle Activity and Mechanics During Walking With and Without Unilateral Weight.
Hip and Trunk Muscle Activity and Mechanics During Walking With and Without Unilateral Weight.
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DOI：
10.1123/jab.2020-0273
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发表时间：
2021-08-01
影响因子：
1.4
通讯作者：
Lewis CL
中科院分区：
文献类型：
--
作者：
Graber KA;Loverro KL;Baldwin M;Nelson-Wong E;Tanor J;Lewis CL
骨盆下垂是由髋外展肌活动减少引起的，并与下肢损伤有关。髋外展肌强化练习是公认的；然而，没有标准的方法在功能活动中增加髋外展肌的活跃度。本研究的目的是研究单侧负重步行的效果。26名健康成年人在仪表式跑步机上行走，有手持重量(体重的15%-20%)和不手持重量(体重的15%-20%)。肌肉活动度、运动学和运动学数据分别使用表面肌电图仪、运动捕捉和测力板收集。使用带有广义估计方程修正的广义线性模型，比较了不同条件(未加权/加权)下的每侧(对侧/同侧体重)的平均髋部和躯干肌肉活动度、髋部、骨盆和躯干角度以及站立时髋关节内的峰值力矩。在肌肉活动、前平面骨盆和躯干角度以及前平面髋关节力矩方面，观察了状态和侧之间的交互作用(p≤.003)。与非负重状态相比，负重状态的对侧髋外展肌活动度较高(p<；.001)，而与负重状态同侧的髋外展肌活动度没有变化(p≥.790)。运动学和运动学变量也发现了类似的变化。单侧负重步行可能是增加髋外展肌功能的一种治疗选择。
Pelvic drop is caused by decreased hip abductor muscle activity and is associated with lower extremity injury. Hip abductor strengthening exercises are well-established; however, no standard method exists to increase hip abductor activity during functional activities. The purpose of this research was to study the effects of walking with a unilateral weight. Twenty-six healthy adults walked on an instrumented treadmill with and without hand-held weight (15–20% body weight). Muscle activity, kinematic, and kinetic data were collected using surface electromyography, motion capture, and force plates, respectively. Average hip and trunk muscle activity, hip, pelvic, and trunk angles, and peak internal hip moments during stance were compared for each side (contralateral/ipsilateral to the weight) between conditions (unweighted/weighted) using a generalized linear model with generalized estimating equation correction. Interactions between condition and side were observed for muscle activity, frontal plane pelvic and trunk angles, and frontal plane hip moments (p≤.003). Compared to the unweighted condition, the weighted condition had higher hip abductor activity contralateral to the weight (p<.001), while no change was found ipsilateral to the weight (p≥.790). Similar changes were found for kinematic and kinetic variables. Walking with a unilateral weight may be a therapeutic option to increase functional hip abductor activity.
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