A Survey Over The Effect Of Imaginary Exercises On Activation Of Shoulder Muscles

  • Khosro Khademi Kalantari
  • Nasrin Davoodi


Background and Aim: The present study was conducted to identify the effect of imaginary exercises on electrical activity of the shoulder muscles.

Materials and Method: Twenty three healthy subjects (17 females and 6 males) with no history of shoulder injury participated in this quasi experimental study. Surface EMG was recorded by bipolar electrodes that were applied over the supraspinatus, infraspinatus, posterior deltoid, middle deltoid, anterior deltoid and pectoralis major. Subjects performed 6 imaginary exercises including imagination of flexion, extension, abduction, adduction, external rotation and internal rotation. The amount of RMS obtained in EMG while exercising was compared with the one obtained at rest.

Results: Performing the imaginary exercises resulted in significant activation (P < 0.01) of the shoulder muscles. In the case of the supraspinatus muscle, a significant difference (P < 0.05) was found between exercise type and intensity of activation but no significant value was seen for infraspinatus muscle. In flexion, abduction, adduction & internal rotation imaginary exercises, correlation between muscles activation was also statistically significant (P<0.01).

Conclusions: Imaginary exercises can be used as alternative means and the first step for shoulder muscles rehabilitation specialty when the movement of the joint is contradicted.

Key words: Imaginary exercise, motor control re-education, rotator cuff and kinsiologic electromyography

مقدمه و هدف

هدف از این پژوهش تعیین تأثیر تمرینات ذهنی بر فعالیت الکتریکی عضلات شانه است .

مواد و روش ها

این مطالعه از نوع شبه تجربی بر روی یک گروه 23 نفری (17 زن و 6 مرد) از افراد سالم و غیر ورزشکار انجام شد. الکترومیوگرافی سطحی توسط الکترود های سطحی دو قطبی از عضلات سوپرا اسپیناتوس، اینفرا اسپیناتوس، دلتوئید خلفی، میانی و قدامی و پکتورالیس ماژور ثبت گردید. نمونه ها شش تمرین ذهنی شامل فلکسیون، اکستانسیون، ابداکسیون، ادداکسیون، چرخش به خارج و داخل را انجام دادند. مقادیر RMS الکترومیوگرافی ثبت شده در حین ورزش ها با مقادیر مشابه ثبت شده در حالت استراحت مقایسه گردید.

یافته ها

انجام تمرینات ذهنی باعث فعال شدن معنی دار (01/0<P) عضلات شانه شد. در مورد عضله سوپرا اسپیناتوس اختلاف معنی دار (05/0<P) بین نوع تمرین و فعال شدن عضله دیده شد ولی در مورد عضله اینفرا اسپیناتوس اختلاف معنی داری دیده نشد. در تمرینات ذهنی فلکسیون، ابداکسیون، ادداکسیون و چرخش به داخل نیز همبستگی معنی داری (01/0<P) بین فعالیت عضلات دیده شد .

بحث و نتیجه گیری

تمرینات ذهنی می تواند به عنوان یک روش فرعی و اولین قدم در باز توانی عضلات مفصل شانه به خصوص زمانی که انجام حرکات مفصلی ممنوع باشد در نظر گرفته شود.

واژگان کلیدی

تمرین ذهنی، باز آموزی موتور کنترل، روتاتور کاف و الکترومیوگرافی کینزیولوژیک

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