Highgenboten C L, Jackson A W, Meske N B
Am J Sports Med. 1988 May-Jun;16(3):234-7. doi: 10.1177/036354658801600306.
The purposes of this investigation were to establish average leg torque values as a proportion of body weight for both concentric and eccentric contractions for leg extension and leg flexion, to determine leg flexion/extension ratios for both concentric and eccentric contractions, and to compare those values in males and females from ages 15 to 34 years. The Kinetic Communicator (Kin-Com, Chattecx Corp., Chattanooga, TN), a relatively new computerized strength testing device, was used so that both concentric and eccentric torques could be measured. Pilot study results indicated that Kin-Com results were reliable, r greater than 0.88. Average torque, across the full range of motion, and peak torque expressed in newton meters were divided by body weight in kilograms to produce torque values adjusted by body weight. No differences across age or sex were observed for flexion/extension ratios, but the males' weight-adjusted torque values were significantly (P less than 0.01) greater than the females'. Younger (ages 15 to 24 years) male and female subjects produced significantly (P less than 0.01) greater torque for concentric contractions than older subjects (25 to 34 years). In rehabilitation programs using the Kin-Com, the weight-adjusted torque values and flexion/extension ratios will be useful in determining patients' strength recovery from knee or leg injury and/or surgery.
本研究的目的是确定腿部伸展和腿部弯曲的向心收缩和离心收缩时，平均腿部扭矩值占体重的比例，确定向心收缩和离心收缩时的腿部弯曲/伸展比率，并比较15至34岁男性和女性的这些值。使用了一种相对较新的计算机化力量测试设备——动力交流器（Kin-Com，Chattecx公司，田纳西州查塔努加），以便能够测量向心扭矩和离心扭矩。初步研究结果表明，Kin-Com的结果是可靠的，r大于0.88。将整个运动范围内的平均扭矩和以牛顿米表示的峰值扭矩除以体重（千克），得出经体重调整的扭矩值。在弯曲/伸展比率方面未观察到年龄或性别差异，但男性经体重调整的扭矩值显著（P小于0.01）高于女性。较年轻（15至24岁）的男性和女性受试者在向心收缩时产生的扭矩显著（P小于0.01）高于年龄较大的受试者（25至34岁）。在使用Kin-Com的康复计划中，经体重调整的扭矩值和弯曲/伸展比率将有助于确定患者从膝盖或腿部损伤和/或手术中恢复的力量情况。
