Department of Physical Therapy, Marquette University, Milwaukee, WI 53201, USA.
Arch Phys Med Rehabil. 2011 Jan;92(1):89-95. doi: 10.1016/j.apmr.2010.10.006.
The purpose of this study was to identify exercise protocols incorporating isometric contractions that provide pain relief in women with fibromyalgia.
A before-after trial.
A physical therapy department in an academic setting.
Fifteen women (mean ± SD, 52±11y) with fibromyalgia.
Subjects completed 4 sessions: 1 familiarization and 3 experimental. The following randomized experimental sessions involved the performance of isometric contractions with the elbow flexor muscles that varied in intensity and duration: (1) 3 maximal voluntary contractions (MVCs), (2) 25% MVC held to task failure, and (3) 25% MVC held for 2 minutes.
Experimental pain (pain threshold and pain rating), Fibromyalgia Impact Questionnaire, and fibromyalgia pain intensity (visual analog scale).
After all 3 isometric contractions, there was considerable variability between subjects in the pain response. Based on the changes in experimental pain, subjects were divided into 3 groups (increase, decrease, no change in pain). Multiple regression analysis revealed that age, baseline experimental pain, and change in fibromyalgia pain intensity were significant predictors of the experimental pain response after the isometric contractions.
We identified subgroups of women with fibromyalgia based on how they perceived pain after isometric contractions. The greatest pain relief for women with fibromyalgia occurred at a younger age and in women with the greatest experimental pain before exercise. Additionally, we established a link between experimental and clinical pain relief after the performance of isometric contractions.
本研究旨在确定包含等长收缩的运动方案，以缓解纤维肌痛女性的疼痛。
前后试验。
学术环境中的物理治疗部门。
15 名女性（平均±标准差，52±11 岁）患有纤维肌痛。
受试者完成了 4 次会话：1 次熟悉和 3 次实验。以下随机实验会话涉及到不同强度和持续时间的肘屈肌等长收缩：（1）3 次最大自主收缩（MVC），（2）25% MVC 持续至任务失败，（3）25% MVC 持续 2 分钟。
实验性疼痛（疼痛阈值和疼痛评分）、纤维肌痛影响问卷和纤维肌痛疼痛强度（视觉模拟量表）。
在所有 3 次等长收缩后，受试者的疼痛反应存在很大的个体差异。基于实验性疼痛的变化，受试者被分为 3 组（疼痛增加、疼痛减少、疼痛无变化）。多元回归分析显示，年龄、基线实验性疼痛和纤维肌痛疼痛强度的变化是等长收缩后实验性疼痛反应的显著预测因子。
我们根据女性在等长收缩后对疼痛的感知，确定了纤维肌痛女性的亚组。对于纤维肌痛女性来说，最大的疼痛缓解发生在较年轻的年龄，并且在运动前实验性疼痛最大的女性中。此外，我们在等长收缩后建立了实验性和临床疼痛缓解之间的联系。
