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首页> 外文期刊>Journal of electromyography and kinesiology: Official journal of the International Society of Electrophysiological Kinesiology >Using relative phase analyses and vector coding to quantify Pelvis-Thorax coordination during lifting-A methodological investigation
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Using relative phase analyses and vector coding to quantify Pelvis-Thorax coordination during lifting-A methodological investigation

机译：使用相对相位分析和载体编码在提升过程中量化骨盆 - 胸部协调 - 方法研究

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摘要

Low-back disorder risk can be modulated by pelvis-thorax coordination when lifting. To objectively discriminate between coordination patterns during lifting, the analytical methods used require evaluation. The primary study objective was to determine if continuous relative phase (CRP) and vector coding (VC) analyses can discriminate between lifting techniques that differ based on biomechanical risk criteria. The secondary objective was to determine if normalization/transformation of input segmental angular position and velocity data is required to discriminate between lifting techniques. Sixteen volunteers performed a sagittal lifting task using freestyle (FRE), flexed spine (FLX), and neutral spine (NTL) techniques. CRP and VC analyses were implemented to quantify pelvis-thorax coordination patterns based on time-normalized, phase-normalized, and Hilbert-transformed segmental angular kinematic data. Mean relative phase angles along with thorax-only and in-phase coupling patterns were significantly different between FRE-NTL and FLX-NTL techniques (p 0.01), but not FRE-FLX (p 0.44). This finding was consistent across all relative phase normalization/transformation methods. Therefore, CRP and VC analyses successfully discriminated between different lifting techniques, regardless of the relative phase normalization/transformation method used.
机译：抬举时骨盆与胸部的协调可以调节下背部疾病的风险。为了客观区分起重过程中的协调模式，需要对所使用的分析方法进行评估。主要研究目的是确定连续相对时相（CRP）和向量编码（VC）分析是否可以区分基于生物力学风险标准不同的举重技术。第二个目标是确定是否需要对输入的节段角位置和速度数据进行归一化/转换，以区分提升技术。16名志愿者使用自由泳（FRE）、弯曲脊柱（FLX）和中性脊柱（NTL）技术完成了矢状提升任务。根据时间标准化、相位标准化和希尔伯特变换的节段角度运动学数据，进行CRP和VC分析，以量化骨盆-胸部协调模式。FRE-NTL和FLX-NTL技术之间的平均相对相位角以及仅胸部和同相耦合模式存在显著差异（p；0.01），但FRE-FLX技术不存在显著差异（p；0.44）。这一发现在所有相对相位归一化/转换方法中都是一致的。因此，CRP和VC分析成功地区分了不同的提升技术，而不考虑使用的相对相位归一化/转换方法。

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