ISOMETRIC & ISOKINETIC TESTING OF ANKLE PLANTAR FLEXION STRENGTH & ENDURANCE

等距

• 批准号: 6121068
• 负责人: GARY DUDLEY
• 金额: $ 1.35万
• 依托单位: UNIVERSITY OF PENNSYLVANIA
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-30 至 1999-09-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6121068
• 关键词: biomedical resource; enzymes; musculoskeletal system

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.

使用等长和等速力量测量有助于 许多运动训练师，运动生理学家，物理治疗师， 和其他可靠的测量自愿生产的力量，权力， 扭矩和功。 尽管有大量的研究集中在 在膝盖、股四头肌、肩膀和背部， 踝关节尚未得到很好的研究。 这项研究的目的是 进行踝关节跖屈的可重复力量测量 在10周的时间里。 七名健康受试者， 活动从中度到活跃，进行了研究。 受试者 在第1周（W1）、第5周（W5）和第10周（W10）三个不同时间进行检测， 10（W10）。 将空档位置（0_）设置为90_角， 脚和胫骨 测试最大等长肌力， 踝关节在定义的0_中立位置和10_足底位置 屈运动 对5例患者进行最大自主收缩（MVC） 秒 在中性肌和非中性肌之间进行等速收缩。 位置和受试者最大跖屈位置 体验舒适。 等速强度测量为 角速度为30、60、120和180度/秒。 最大 等速耐力测试通过监测疲劳和总工作 以60 °/秒的速度重复进行50次等速足底屈曲。 y.为 所有强度测试的变异系数超过三个 测量值在1%和8%之间。 程度最高 等长肌力和等速肌力具有重复性 低速测量。 组间相关系数 在30 o/sec和60 o/sec速率下的等长和等速峰值扭矩 范围为0.89 ~ 0.93（p<0.0001）。 等速耐力测试， 然而，显示出更高的变异程度。 本研究建议 测量等长肌力，并在较小程度上测量等速肌力 可以作为一种可靠的诊断工具， 踝关节损伤患者的康复和力量恢复 关节创伤，废用和随之而来的骨骼肌萎缩， 足底屈肌周围