被诊断为外侧上髁炎的个体在进行低强度抗阻治疗性锻炼期间，所选前臂肌肉的肌电图（EMG）活动比较。

Landis Jamie, Keselman Inna, Murphy Catherine N

Department of Health Sciences, Cleveland State University, Cleveland, OH 44115, USA.

Work. 2005;24(1):85-91.

BACKGROUND AND PURPOSE

This was a descriptive and exploratory study of electromyographic (EMG) activity of wrist extensor musculature specific to the extensor digitorum (ED), extensor carpi radialis brevis (ECRB) and flexor carpi radialis (FCR) in individuals with a medical diagnosis of the common work associated complaint of lateral epicondylitis (LE). The purpose was to evaluate and compare the EMG activity of the selected forearm muscles during three different types of resistive (strengthening) therapeutic exercises (rubber ball, theraputty, and "make-it-disappear" (MID) sponge) in participants with LE.

PARTICIPANTS

Five individuals between the ages of 44 and 55 years of age diagnosed with lateral epicondylitis by a physician were recruited on a voluntary basis from a local outpatient clinic.

METHODS

The participants completed 1 min. of each of the resistive exercises, which were assigned randomly. Muscle activity was collected simultaneously by 3 surface electrodes (4/18/16 DE-2.3 silver surface EMG electrodes, Delsys Inc, Boston, MA) and recorded on an EMG Myomonitor-4 (Delsys Inc, Boston, MA) utilizing EmgCE software (Delsys Inc, Boston, MA). The raw EMG signal was converted to a root mean square (RMS) at each 0.0625 second interval during the full 60 second recording using EMGWorks, (Delsys, Inc, Boston, MA). The data were pooled, and the mean RMS was then determined as an overall measure of activity for each muscle during the 60 recording.

RESULTS

A 1-way ANOVA with Tukey's post-test was completed using Prizm Software (Graph Pad Software, Inc, San Diego, CA) for a comparison of the mean RMS values of each muscle during each activity. Statistically significant between group differences were noted for all muscles, among all exercises. Relative activity was noted to be greatest for ED and FCR during MID exercise, and for ECRB during putty exercise.

CONCLUSION

All three exercises represent different patterns of muscle activity, for the muscles observed. The possible differences in the recorded activity may be consequent to the specific positioning and movement requirements involved in the performance of the distinct exercises. Practitioners may find the evidence of this study helpful in designing rehabilitation programs for those affected with lateral epicondylitis.

背景与目的

这是一项描述性和探索性研究，针对经医学诊断患有常见的与工作相关的外侧上髁炎（LE）的个体，研究伸指总肌（ED）、桡侧腕短伸肌（ECRB）和桡侧腕屈肌（FCR）特定的腕伸肌肌肉组织的肌电图（EMG）活动。目的是评估和比较LE患者在三种不同类型的抗阻（强化）治疗性锻炼（橡胶球、治疗用橡皮泥和“使其消失”（MID）海绵）过程中所选前臂肌肉的EMG活动。

参与者

从当地一家门诊诊所自愿招募了5名年龄在44至55岁之间、经医生诊断患有外侧上髁炎的个体。

方法

参与者随机完成每种抗阻锻炼各1分钟。通过3个表面电极（4/18/16 DE - 2.3银质表面EMG电极，Delsys公司，马萨诸塞州波士顿）同时采集肌肉活动，并使用EmgCE软件（Delsys公司，马萨诸塞州波士顿）在EMG Myomonitor - 4（Delsys公司，马萨诸塞州波士顿）上进行记录。在使用EMGWorks（Delsys公司，马萨诸塞州波士顿）进行的60秒完整记录过程中，每隔0.0625秒将原始EMG信号转换为均方根（RMS）。汇总数据，然后确定平均RMS作为每块肌肉在60秒记录期间活动的总体度量。

结果

使用Prizm软件（Graph Pad Software公司，加利福尼亚州圣地亚哥）完成了带有Tukey事后检验的单因素方差分析，以比较每种活动期间每块肌肉的平均RMS值。在所有锻炼过程中，所有肌肉在组间均存在统计学上的显著差异。在MID锻炼期间，ED和FCR的相对活动最为明显，而在使用橡皮泥锻炼期间，ECRB的相对活动最为明显。