ISOMETRIC & ISOKINETIC TESTING OF ANKLE PLANTAR FLEXION STRENGTH & ENDURANCE

等长和等速力量测量的使用有所帮助 很多运动教练，运动生理学家，理疗师， 和其他人可靠地衡量自愿生产的力量，权力， 扭矩和功。尽管已经有大量的研究集中在 在膝盖、股四头肌、肩部和背部， 脚踝一直没有得到很好的研究。这项研究的目的是 进行踝关节足底屈曲的可重复性强度测量 在10周的时间里。七名健康受试者，身体状况各不相同 从中等活性到活性，都进行了研究。受试者是 在三个不同的场合进行测试：第1周(W1)、第5周(W5)和每周 10(W10)。空档位置(0_)设置为90度角 脚和胫骨。最大等轴测强度用 定义的0_中立位置和10_足底位置的踝关节 屈曲。最大自主收缩(MVC)5例 几秒钟。在中性点之间形成等速收缩。 受试者的最大足底屈曲位置 体验到舒适的。等速运动强度是在 角速度30度/秒、60度/秒、120度/秒和180度/秒。最大 通过监测疲劳和总功来测试等速耐力 以60秒/秒的速度重复进行50次等速足底屈曲。Y。用于 所有的强度都测试了三种材料的变异系数 测量范围在1%到8%之间。最高程度的 等长肌力和等速肌力具有可重复性 在低速下进行测量。类间相关系数 30o/秒和60o/秒速率下的等长和等速峰力矩 从0.89到0.93(p&lt；0.0001)。等速耐力测试， 但表现出较高的变异程度。这项研究表明 等长肌力的测量，以及较小程度的等速力量的测量 可以潜在地用作可靠的诊断工具来监控 踝关节术后患者的康复与力量恢复 关节损伤、废用和随之而来的骨骼肌萎缩 在足底屈肌周围。

Use of isometric and isokinetic strength measurements has helped many athletic trainers, exercise physiologists, physical therapists, and others to reliably measure voluntary production of force, power, torque and work. Although there have been ample studies concentrated on the knee, quadriceps, shoulder, and back, the reliability of the ankle has not been well studied. The purpose of this research was to conduct reproducible strength measurements of ankle plantar flexion over a 10 week period. Seven healthy subjects, ranging in physical activity from moderate to active, were studied. The subjects were tested on three different occasions week 1 (W1), week 5 (W5), and week 10 (W10). The neutral position (0_) was set at a 90_ angle between the foot and the tibia. Maximal isometric strength was tested with the ankle at the defined 0_ neutral position and at 10_ plantar flexion. Maximal voluntary contractions (MVCs) were performed for 5 seconds. Isokinetic contractions were per formed between the neutral position and the maximal plantar flexion position that the subjects experienced as being comfortable. Isokinetic strength was measured at angular velocities of 30, 60, 120 and 180 degrees/sec. Maximal isokinetic endurance was tested by monitoring fatigue and total work done over 50 repeated isokinetic plantar flexions at 60_/sec. y. For all strength tests the coefficient of variation over the three measurements ranged between 1 and 8%. The highest degree of reproducibility was found in the isometric and isokinetic strength measurements at low speeds. Interclass correlation coefficients for isometric and isokinetic peak torques at rates of 30o/sec and 60o/sec ranged from 0.89 to 0.93 (p<0.0001). The isokinetic endurance test, however, showed a higher degree of variance. This study suggests that measurement of isometric and, to a lesser extent, isokinetic strength can potentially be used as a reliable, diagnostic tool to monitor patients' rehabilitation and recovery of strength following ankle joint trauma, disuse and consequent skeletal muscle atrophy in surrounding plantar flexors.