Bandy W D, McLaughlin S
Department of Physical Therapy, University of Central Arkansas, Conway 72035-0001.
J Orthop Sports Phys Ther. 1993 Nov;18(5):609-13. doi: 10.2519/jospt.1993.18.5.609.
The Cybex 6000 isokinetic dynamometer is a new isokinetic device for which no published reports of reliability have been presented in the literature. In addition, the manufacturer not only claims that the new Cybex 6000 is reliable but that torque data obtained from the Cybex 6000 are consistent with data obtained from past Cybex systems, such as the Cybex II. The purpose of this study was to investigate the intramachine reliability of the Cybex 6000 to itself and the intermachine reliability of the Cybex 6000 and the Cybex II. Data on peak torque, work, and power were collected using the Cybex 6000, and data on peak torque were obtained using the Cybex II for knee flexion and extension in 20 volunteers (10 males, 10 females). Subjects were tested three times, twice on the Cybex 6000 and once on the Cybex II, approximately 1 week apart across a 3-week period of time at angular velocities of 60, 180, and 300 degrees/sec. Data were analyzed using intraclass correlations. Results indicated that the majority of test-retest correlation coefficients for all parameters for intramachine reliability of the Cybex 6000 were above .90. Comparing peak torque obtained with the Cybex 6000 to that obtained with the Cybex II (intermachine reliability), correlation coefficients ranged from .72 to .89. In conclusion, information obtained on the Cybex 6000 appears to be quite reliable in a test-retest situation using the same equipment and moderately reliable when compared to the Cybex II. Clinical implications for these results are discussed.
Cybex 6000等速测力计是一种新型等速设备，目前文献中尚无关于其可靠性的公开报道。此外，制造商不仅声称新型Cybex 6000可靠，还称从Cybex 6000获得的扭矩数据与过去的Cybex系统（如Cybex II）获得的数据一致。本研究的目的是调查Cybex 6000自身的机器内可靠性以及Cybex 6000与Cybex II之间的机器间可靠性。使用Cybex 6000收集了峰值扭矩、功和功率的数据，并使用Cybex II获得了20名志愿者（10名男性，10名女性）膝关节屈伸的峰值扭矩数据。受试者进行了三次测试，两次使用Cybex 6000，一次使用Cybex II，在3周的时间内，每次测试间隔约1周，角速度分别为60、180和300度/秒。使用组内相关性分析数据。结果表明，Cybex 6000机器内可靠性所有参数的重测相关系数大多高于0.90。将Cybex 6000获得的峰值扭矩与Cybex II获得的峰值扭矩进行比较（机器间可靠性），相关系数范围为0.72至0.89。总之，在使用相同设备的重测情况下，Cybex 6000获得的信息似乎相当可靠，与Cybex II相比则具有中等可靠性。文中讨论了这些结果的临床意义。
