Griffin J W
Phys Ther. 1987 Aug;67(8):1205-8. doi: 10.1093/ptj/67.8.1205.
The purposes of this study were to describe torque-velocity relationships during concentric, eccentric, and isometric testing of elbow flexor muscles and to determine test-retest reliability of a specific isokinetic testing protocol. Thirty healthy women were tested using an isokinetic dynamometer at velocities of 0 degrees, 30 degrees, 120 degrees, and 210 degrees/sec. Reliability was assessed in 20 of the subjects by retesting concentric and eccentric torques at 30 degrees and 120 degrees/sec after a 30-minute rest interval. The highest torque from three maximal efforts was considered to be peak torque. Mean eccentric peak torque was greater than either isometric or concentric peak torque; as isokinetic test velocity increased, the differences between concentric and eccentric torques became larger. Intraclass correlation coefficients ranged from .72 to .83, indicating lack of consistency between test and retest torques. Consecutive concentric-eccentric testing and lack of mechanical stabilization might have contributed to test-retest variability and to the relatively small differences between concentric and eccentric torques. Continued study of reliability of isokinetic testing protocols and further investigation of concentric-eccentric torque-velocity relationships are advocated.
本研究的目的是描述肘屈肌在向心、离心和等长测试过程中的扭矩-速度关系，并确定特定等速测试方案的重测信度。30名健康女性使用等速测力计在0度、30度、120度和210度/秒的速度下进行测试。在30分钟的休息间隔后，对20名受试者在30度和120度/秒的速度下重新测试向心和离心扭矩，以此评估信度。三次最大用力产生的最高扭矩被视为峰值扭矩。平均离心峰值扭矩大于等长或向心峰值扭矩；随着等速测试速度的增加，向心和离心扭矩之间的差异变得更大。组内相关系数在0.72至0.83之间，表明测试扭矩和重测扭矩之间缺乏一致性。连续的向心-离心测试以及缺乏机械稳定可能导致了重测变异性以及向心和离心扭矩之间相对较小的差异。提倡对等速测试方案的信度进行持续研究，并进一步探究向心-离心扭矩-速度关系。
