Bressel Eadric, McNair Peter J
Utah State University, Department of Health, Physical Education, and Recreation, 7000 Old Main Hill, Logan, UT 84322, USA.
Phys Ther. 2002 Sep;82(9):880-7.
Continuous passive motion (cyclic stretching applied to the subject's limb) has been used for the rehabilitation of some orthopedic impairments; however, few researchers have considered its application in the management of neurological disorders such as stroke. The purpose of this study was to examine the short-term effects of prolonged static and cyclic calf stretching on passive ankle joint stiffness, torque relaxation, and gait in people with ischemic stroke.
Ten community-dwelling people (mean age=64.6 years, SD=8.76, range=53-76) who were diagnosed with a cerebrovascular accident volunteered to be subjects.
Participants engaged in one 30-minute static stretch and one 30-minute cyclic stretch of the calf muscle, using an isokinetic dynamometer that also collected torque and angle measurements. Before and after treatments, 10-m walking times were collected. Ankle joint stiffness was calculated from the slope of the torque and angle curves before and immediately after treatments, and torque relaxation was calculated as the percentage of decrease in peak passive torque over the 30-minute stretch durations.
Ankle joint stiffness decreased by 35% and 30% after the static and cyclic stretches, respectively. Stiffness values and 10-m walk times were not different between conditions. The amount of torque relaxation was 53% greater for static stretching than for cyclic stretching.
These preliminary data from a very small sample of people with stroke indicate that ankle joint stiffness decreases after both prolonged static and cyclic stretches; however, neither technique appears to be better at reducing stiffness in people with stroke. Torque relaxation is greater after static stretching than after cyclic stretching, and walking speed does not appear to be influenced by the stretching treatments used in our study.
持续被动运动（对受试者肢体进行周期性拉伸）已用于某些骨科损伤的康复治疗；然而，很少有研究人员考虑将其应用于中风等神经系统疾病的管理。本研究的目的是探讨长时间静态和周期性小腿拉伸对缺血性中风患者被动踝关节僵硬、扭矩松弛和步态的短期影响。
十名被诊断患有脑血管意外的社区居民（平均年龄 = 64.6岁，标准差 = 8.76，范围 = 53 - 76岁）自愿成为受试者。
参与者使用等速测力计对小腿肌肉进行一次30分钟的静态拉伸和一次30分钟的周期性拉伸，该测力计还收集扭矩和角度测量数据。在治疗前后，收集10米步行时间。根据治疗前和治疗后即刻的扭矩和角度曲线斜率计算踝关节僵硬程度，并将扭矩松弛计算为30分钟拉伸持续时间内被动峰值扭矩降低的百分比。
静态拉伸和周期性拉伸后，踝关节僵硬程度分别降低了35%和30%。不同条件下的僵硬值和10米步行时间没有差异。静态拉伸的扭矩松弛量比周期性拉伸大53%。
这些来自非常小样本中风患者的初步数据表明，长时间静态和周期性拉伸后踝关节僵硬程度均降低；然而，在降低中风患者的僵硬程度方面，这两种技术似乎都没有更好的效果。静态拉伸后的扭矩松弛比周期性拉伸后更大，并且步行速度似乎不受我们研究中使用的拉伸治疗的影响。
