Mayhew T P, Rothstein J M, Finucane S D, Lamb R L
Department of Physical Therapy, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298.
Phys Ther. 1994 Nov;74(11):1047-54. doi: 10.1093/ptj/74.11.1047.
The purpose of this study was to assess the performance characteristics of a Kin-Com dynamometer (model #500-11) under controlled conditions.
Comparisons were made between measurements of force, angle, and velocity obtained from the Kin-Com and measurements acquired from an external recording system of known weights, angles, and user-set velocities. The strength of the linear relationships between measurements obtained with the different recording systems was analyzed using a coefficient of determination (r2). An intraclass correlation coefficient (ICC[2,1]) was used to examine the reliability of the force, angle, and velocity measurements obtained with each recording system on 2 different days.
In all conditions, the coefficient of determination for the force, angle, and velocity comparisons was above .99. The ICC for between-day comparisons for all force, angle, and velocity measurements was above .99.
Our results indicate that the static measurements of force and angle that are necessary for use in the gravity-correction procedure and isometric testing are accurate and replicable between days. The Kin-Com dynamometer's control system regulating lever arm velocity is also accurate and replicable under a no-load condition. It was ascertained during the velocity testing that the use of any acceleration and deceleration mode other than "high" resulted in a loss of excursion of the lever arm.
本研究旨在评估Kin-Com测力计（型号#500 - 11）在受控条件下的性能特征。
对Kin-Com测得的力、角度和速度测量值与从已知重量、角度和用户设定速度的外部记录系统获取的测量值进行比较。使用决定系数（r2）分析不同记录系统获得的测量值之间线性关系的强度。使用组内相关系数（ICC[2,1]）来检验每个记录系统在2个不同日期获得的力、角度和速度测量值的可靠性。
在所有条件下，力、角度和速度比较的决定系数均高于0.99。所有力、角度和速度测量值的日间比较的ICC均高于0.99。
我们的结果表明，重力校正程序和等长测试中使用的力和角度的静态测量值在不同日期之间是准确且可重复的。Kin-Com测力计调节杠杆臂速度的控制系统在无负载条件下也是准确且可重复的。在速度测试期间确定，使用“高”模式以外的任何加速和减速模式都会导致杠杆臂行程损失。
