Schröder Jan, Reer Rüdiger
Institut für Bewegungswissenschaft, Sport- und Bewegungsmedizin, Universität Hamburg, Turmweg 2, 20148, Hamburg, Deutschland.
Orthopadie (Heidelb). 2024 Mar;53(3):209-217. doi: 10.1007/s00132-024-04473-y. Epub 2024 Feb 20.
In the environment of orthopaedic rehabilitation, isometric strength testing is part of the monitoring in order to document the success of the therapy. For clinical applications, reference values, or at least orientation benchmarks, are needed for every single device, because of serious concerns for direct inter-device comparisons. According to functional ratios, there is only little literature covering comparability concerns. This study aimed to demonstrate reference values for two strength diagnosis systems for trunk and knee-joint flexion and extension as well as resulting functional ratios along with analyses of reproducibility and vice-versa comparisons.
In a cross-sectional design, reference values (M, SD, Median, IQR, 5 and 95% percentiles) of 98 healthy adults (47 females, age 25.7±8.2 years, BMI 23.3±2.6 kg/m) were assessed for trunk and knee flexion and extension and the according functional ratios using either the Myoline or the Frei medical system. For a sub-sample of 20 persons (50% females), the mutual explained total variance (r) and reliability (ICC3.1, SEM, VK%) were analyzed.
Both systems were shown to be reliable (ICC3.1 0.76-0.95), while functional ratios demonstrated a lower reliability (ICC3.1 0.62-0.92). For peak forces, the mutual total explained variance (r) ranged between 19-68%, for functional ratios on an even lower level (5-21%).
The resulting strength test values, and especially the related functional ratios, obtained with the two strength test devices are not comparable at all, but each device was shown to be a reliable tool. Distributions of body weight adjusted peak forces and functional ratios may serve as device specific benchmark values for strength testing in clinical environments.
在骨科康复环境中，等长肌力测试是监测的一部分，用于记录治疗效果。对于临床应用，由于对设备间直接比较存在严重担忧，每种设备都需要参考值，或者至少需要定向基准。根据功能比率，涉及可比性问题的文献很少。本研究旨在展示两种用于躯干和膝关节屈伸的力量诊断系统的参考值以及由此产生的功能比率，同时分析其再现性以及反之的比较。
采用横断面设计，对98名健康成年人（47名女性，年龄25.7±8.2岁，体重指数23.3±2.6kg/m）使用Myoline或Frei医疗系统评估躯干和膝关节屈伸以及相应的功能比率的参考值（均值、标准差、中位数、四分位距、第5和第95百分位数）。对20人的子样本（50%为女性）分析相互解释的总方差（r）和可靠性（组内相关系数3.1、测量标准误、变异系数%）。
两种系统均显示可靠（组内相关系数3.1为0.76 - 0.95），而功能比率的可靠性较低（组内相关系数3.1为0.62 - 0.92）。对于峰值力，相互解释的总方差（r）在19% - 68%之间，功能比率的水平更低（5% - 21%）。
使用这两种力量测试设备获得的力量测试值，尤其是相关的功能比率，根本无法比较，但每种设备都被证明是一种可靠的工具。体重调整后的峰值力和功能比率的分布可作为临床环境中力量测试的设备特定基准值。
