Sports Medicine & Sports Orthopeadics, University Outpatient Clinic, University of Potsdam, Am Neuen Palais 10, Building 12, 14469, Potsdam, Germany.
Division of Physiotherapy, Department of Health Professions, Bern University of Applied Sciences, Murtenstrasse 10, 3008, Bern, Switzerland.
Sci Rep. 2023 Jan 4;13(1):152. doi: 10.1038/s41598-022-26932-2.
The output of a sensorimotor performance can be measured with the joint position sense (JPS) test. However, investigations of leg dominance, sex and quality measures on this test are limited. Therefore, these potential influencing factors as well as reliability and consistency measures were evaluated for angular reproduction performance and neuromuscular activity during the active knee JPS test in healthy participants. Twenty healthy participants (10 males; 10 females; age 29 ± 8 years; height 165 ± 39 cm; body mass 69 ± 13 kg) performed a seated knee JPS test with a target angle of 50°. Measurements were conducted in two sessions separated by two weeks and consisted of two blocks of continuous angular reproduction (three minutes each block). The difference between reproduced and target angle was identified as angular error measured by an electrogoniometer. During reproduction, the neuromuscular activity of the quadriceps muscle was assessed by surface electromyography. Neuromuscular activity was normalized to submaximal voluntary contraction (subMVC) and displayed per muscle and movement phase. Differences between leg dominance and sex were calculated using Friedman-test (α = 0.05). Reliability measures including intraclass correlation coefficient (ICC), Bland-Altman analysis (bias ± limits of agreement (LoA)) and minimal detectable change (MDC) were analysed. No significant differences between leg dominance and sex were found in angular error and neuromuscular activity. Angular error demonstrated inter-session ICC scores of 0.424 with a bias of 2.4° (± 2.4° LoA) as well as MDC of 6.8° and moderate intra-session ICC (0.723) with a bias of 1.4° (± 1.65° LoA) as well as MDC of 4.7°. Neuromuscular activity for all muscles and movement phases illustrated inter-session ICC ranging from 0.432 to 0.809 with biases between - 2.5 and 13.6% subMVC and MDC from 13.4 to 63.9% subMVC. Intra-session ICC ranged from 0.705 to 0.987 with biases of - 7.7 to 2.4% subMVC and MDC of 2.7 to 46.5% subMVC. Leg dominance and sex seem not to influence angular reproduction performance and neuromuscular activity. Poor to excellent relative reliability paired with an acceptable consistency confirm findings of previous studies. Comparisons to pathological populations should be conducted with caution.
运动感知表现的输出可以通过关节位置觉（JPS）测试来测量。然而，关于腿部优势、性别和质量测量在该测试中的影响因素的研究还很有限。因此，在健康参与者的主动膝关节 JPS 测试中，评估了这些潜在的影响因素以及角重现性能和神经肌肉活动的可靠性和一致性测量。20 名健康参与者（10 名男性；10 名女性；年龄 29±8 岁；身高 165±39cm；体重 69±13kg）进行了一项膝关节 JPS 测试，目标角度为 50°。测量在两周内分两次进行，每次测量包括两个连续角度重现（每个 3 分钟）的模块。通过电子角度计识别出重现角度与目标角度之间的差异，作为角度误差。在重现过程中，通过表面肌电图评估股四头肌的神经肌肉活动。神经肌肉活动被归一化为亚最大自主收缩（subMVC），并按肌肉和运动阶段显示。使用 Friedman 检验（α=0.05）计算腿部优势和性别的差异。使用组内相关系数（ICC）、Bland-Altman 分析（偏差±一致性界限（LoA））和最小可检测变化（MDC）分析可靠性测量。在角度误差和神经肌肉活动方面，未发现腿部优势和性别之间存在显著差异。角度误差的组内 ICC 评分为 0.424，偏差为 2.4°（±2.4° LoA），MDC 为 6.8°，组内 ICC 评分为 0.723，偏差为 1.4°（±1.65° LoA），MDC 为 4.7°。所有肌肉和运动阶段的神经肌肉活动的组间 ICC 范围为 0.432 至 0.809，亚最大自主收缩（subMVC）的偏差范围为-2.5%至 13.6%，MDC 范围为 13.4%至 63.9%。组内 ICC 范围为 0.705 至 0.987，亚最大自主收缩（subMVC）的偏差范围为-7.7%至 2.4%，MDC 范围为 2.7%至 46.5%。腿部优势和性别似乎不会影响角度重现性能和神经肌肉活动。较差到较好的相对可靠性与可接受的一致性相结合，证实了先前研究的结果。在与病理性人群进行比较时应谨慎进行。
