Background

Trunk movement compensation characterized as ipsilateral trunk lean and posterior rotation with respect to pelvis during stance phase of walking is common in people with hip osteoarthritis and a biomarker of deficits in physical function in older adults. However, the relationship between trunk movement compensation on deficits in physical performance, muscle strength and functional capacity is unknown.

Methods

A cross-sectional study design was used. Two inertial measurement units were used to assess trunk movement compensation during the six-minute-walk-test. Knee extension, knee flexion and hip abduction strength were measured using hand-held dynamometer. Multivariate regression models, controlling for self-reported hip pain, were used to regress trunk movement compensation onto six-minute-walk-test and muscle strength measures. Pairwise t-tests were used to evaluate the difference trunk movement compensation has on functional capacity by comparing the first and last minute of the six-minute-walk-test.

Findings

Thirty-five participants (63.3 ± 7.4 years, 57% male, 28.6 ± 4.5 kg/m²) were enrolled. Greater trunk movement compensation was related to poorer six-minute-walk-test (p = 0.03; r = −0.46). Greater hip abduction weakness was related to increased trunk movement compensation in both the sagittal (p = 0.05; r = −0.44) and frontal (p = 0.04; r = −0.38) planes. Participants demonstrated greater frontal plane trunk movement compensation during the last minute compared to the first minute of the six-minute-walk-test (p < 0.01).

Interpretation

Trunk movement compensation, identified by inertial measure units, is a clinically relevant measure and has a moderate-to-strong relationship on deficits in physical performance, muscle strength and functional capacity. Inertial measurement units can be used as a practical means of measuring movement quality in the clinical setting.

中文翻译：

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惯性测量单位确定的躯干运动补偿与髋骨关节炎患者的身体表现、肌肉力量和功能能力缺陷有关

背景

躯干运动补偿的特征是在行走的站立阶段，同侧躯干倾斜和骨盆后旋在髋关节骨关节炎患者中很常见，并且是老年人身体功能缺陷的生物标志物。然而，躯干运动补偿与身体表现、肌肉力量和功能能力缺陷之间的关系尚不清楚。

方法

采用横断面研究设计。在六分钟步行测试期间，使用两个惯性测量单元来评估躯干运动补偿。使用手持测力计测量膝关节伸展、膝关节屈曲和髋关节外展力量。多变量回归模型，控制自我报告的髋部疼痛，用于将躯干运动补偿回归到六分钟步行测试和肌肉力量测量。通过比较六分钟步行测试的第一分钟和最后一分钟，使用成对t检验来评估躯干运动补偿对功能能力的差异。

发现

招募了 35 名参与者（63.3 ± 7.4 岁，57% 男性，28.6 ± 4.5 kg/m ²）。更大的躯干运动补偿与较差的六分钟步行测试有关（p  = 0.03；r  = -0.46）。更大的髋外展无力与矢状面（p  = 0.05；r  = -0.44）和正面（p  = 0.04；r  = -0.38）平面的躯干运动补偿增加有关。与六分钟步行测试的第一分钟相比，参与者在最后一分钟表现出更大的正面躯干运动补偿（p  < 0.01）。

解释

由惯性测量单位确定的躯干运动补偿是一种临床相关的测量方法，与身体表现、肌肉力量和功能能力的缺陷具有中度至强的关系。惯性测量单元可用作临床环境中测量运动质量的实用手段。