Martinez-Garcia Dario, Rodriguez-Perea Angela, Barboza Paola, Ulloa-Díaz David, Jerez-Mayorga Daniel, Chirosa Ignacio, Chirosa Ríos Luis Javier
Department of Physical Education, Universidad de Granada, Granada, Andalucia, Spain.
Department of Sports Sciences and Physical Conditioning, Catholic University of Most Holy Concepcion, Concepción, Bio Bio, Chile.
PeerJ. 2020 Oct 27;8:e9951. doi: 10.7717/peerj.9951. eCollection 2020.
The evaluation of the force in internal rotation (IR) and external rotation (ER) of the shoulder is commonly used to diagnose possible pathologies or disorders in the glenohumeral joint and to assess patient's status and progression over time. Currently, there is new technology of multiple joint isokinetic dynamometry that allows to evaluate the strength in the human being. The main purpose of this study was to determine the absolute and relative reliability of concentric and eccentric internal and external shoulder rotators with a functional electromechanical dynamometer (FEMD).
Thirty-two male individuals (21.46 ± 2.1 years) were examined of concentric and eccentric strength of shoulder internal and external rotation with a FEMD at velocities of 0.3 m s and 0.6 m s. Relative reliability was determined by intraclass correlation coefficients (ICC). Absolute reliability was quantified by standard error of measurement (SEM) and coefficient of variation (CV). Systematic differences across velocities testing circumstances, were analyzed with dependent t tests or repeated-measures analysis of variance in case of 2 or more than 2 conditions, respectively.
Reliability was high to excellent for IR and ER on concentric and eccentric strength measurements, regardless of velocity used (ICC: 0.81-0.98, CV: 5.12-8.27% SEM: 4.06-15.04N). Concentric outcomes were more reliable than eccentric due to the possible familiarization of the population with the different stimuli.
All procedures examined showed high to excellent reliability for clinical use. However, a velocity of 0.60 m s should be recommended for asymptomatic male patients because it demands less time for evaluation and patients find it more comfortable.
评估肩部内旋（IR）和外旋（ER）的力量通常用于诊断盂肱关节可能存在的病变或紊乱，并评估患者的状态及随时间的进展情况。目前，有多种关节等速测力技术可用于评估人体力量。本研究的主要目的是使用功能性机电测力计（FEMD）确定肩部同心和偏心内、外旋转肌的绝对和相对可靠性。
对32名男性个体（21.46±2.1岁）使用FEMD在0.3m/s和0.6m/s的速度下检测肩部内旋和外旋的同心和偏心力量。通过组内相关系数（ICC）确定相对可靠性。通过测量标准误差（SEM）和变异系数（CV）对绝对可靠性进行量化。对于速度测试情况的系统差异，分别使用配对t检验或重复测量方差分析（如果有2种或2种以上情况）进行分析。
无论使用何种速度，IR和ER的同心和偏心力量测量的可靠性都很高甚至极佳（ICC：0.81 - 0.98，CV：5.12 - 8.27%，SEM：4.06 - 15.04N）。由于人群可能对不同刺激较为熟悉，同心测量结果比偏心测量结果更可靠。
所有检测程序在临床应用中均显示出高至极佳的可靠性。然而，对于无症状男性患者，建议使用0.60m/s的速度，因为评估所需时间更少且患者感觉更舒适。
