Tesch P A, Lindborg B P, Colliander E B
Department of Environmental Medicine, Karolinska Institute, Stockholm, Sweden.
Clin Physiol. 1990 Jan;10(1):1-9. doi: 10.1111/j.1475-097x.1990.tb00079.x.
A dynamometer designed for torque measurements of uni- and bilateral concentric and eccentric muscle actions of the quadriceps and hamstring muscle groups is described. Torque reproducibility and control of lever-arm position were studied using known standards. In vivo measurements assessed angular velocity, lever-arm acceleration, variability of torque between limbs and reproducibility of torque. Torque obtained from left and right leg attachments was equal when using weights and during dynamic in vivo conditions. Static torque recorded at different lever-arm positions and known torque were equal. Likewise, lever-arm position output equated with known angles. In vivo test-retest of peak torque was found to be reliable. Acceleration of the lever arm was greater for concentric bilateral than for unilateral muscle actions but equal during eccentric muscle actions. The dynamometer is suggested to provide valid and reproducible torque measurements up to at least 700 N m at constant angular velocities up to 2.62 rad s-1. Besides being a research tool the dynamometer is useful in clinical settings for rehabilitation and evaluation of skeletal muscle function.
本文介绍了一种用于测量股四头肌和腘绳肌群单侧及双侧向心和离心肌肉动作扭矩的测力计。使用已知标准研究了扭矩再现性和杠杆臂位置控制。体内测量评估了角速度、杠杆臂加速度、肢体间扭矩的变异性以及扭矩的再现性。在使用重物时以及动态体内条件下，从左腿和右腿附件获得的扭矩相等。在不同杠杆臂位置记录的静态扭矩与已知扭矩相等。同样，杠杆臂位置输出与已知角度相等。发现体内峰值扭矩的重测是可靠的。同心双侧肌肉动作时杠杆臂的加速度大于单侧肌肉动作，但在离心肌肉动作时相等。建议该测力计在高达2.62弧度每秒的恒定角速度下，能够提供至少700牛米的有效且可再现的扭矩测量。除了作为研究工具外，该测力计在临床环境中对于骨骼肌功能的康复和评估也很有用。
