تاثیر شش هفته تمرینات اغتشاشی اندام فوقانی بر قدرت اکسنتریک چرخش دهنده خارجی شانه و میزان چرخش بالایی کتف والیبالیست های مستعد آسیب اندام فوقانی

نویسندگان

دانشگاه خوارزمی

چکیده
ایمبالانس‌های عضلانی در شانه به‌صورت ضعف در عضلات چرخش‌دهنده خارجی نسبت به چرخش‌دهنده‌های داخلی است که ضعف چرخش دهنده های خارجی از ریسک فاکتورهای آسیب شانه والیبالیست‌ها می‌باشند. بدحرکتی کتف می‌تواند به دلیل ایمبالاس عضلات ثبات دهنده کتفی ایجاد شده که با هماهنگی عضلات بهبود مییابد. هدف از انجام این تحقیق بررسی تاثیر تمرینات اغتشاشی بر قدرت اکسنتریک چرخش دهنده های خارجی و کینماتیک کتف می باشد.24 مرد والیبالیست با نمره کمتر از 30 در آزمون سیکوئیست در این تحقیق شرکت کردند که به صورت تصادفی به دوگروه 12 نفری تجربی و کنترل تقسیم شدند .قدرت اکسنتریک چرخش دهنده های خارجی با استفاده از دستگاه ایزوکنیتیک با سرعت 120 درجه بر ثانیه اندازه گیری شد. چرخش بالایی کتف نیز با شیب سنج دوگانه در زوایای°45، °90، °135و انتهای دامنه حرکتی آبداکشن شانه اندازه گیری شد. تغییرات میانگین با استفاده از آزمون آنالیز واریانس با اندازه گیری مکرر بررسی شد. در مقایسه دو گروه تجربی و کنترل اختلاف معناداری در قدرت اکسنتریک چرخش دهنده خارجی شانه مشاهده شد(P=0.032). در بررسی چرخش بالایی کتف فقط در زاویه °135 اختلاف معنادار وجود داشت(P=0.048). در زوایای دیگر اختلاف معناداری بین دو گروه مشاهد نشد( زاویه °45 P=0.497، زاویه °90 P=0.254، انتهای دامنه حرکتی P=0.350).نتایج بیانگر تاثیر مثبت تمرینات اغتشاشی بر قدرت اکسنتریک چرخش دهنده های خارجی و چرخش بالایی کتف در حرکت آبداکشن بازو بود ؛ بنابراین می توان به مربیان و بازیکنان والیبال توصیه نمود که برای افزایش عملکرد و پیشگیری از آسیب های شانه این تمرینات را به برنامه های تمرینی خود اضافه کنند.

کلیدواژه‌ها


عنوان مقاله English

The effect of six weeks of upper extremity perturbation training on eccentric strength of shoulder external rotators and scapula upward rotation in volleyball players prone to upper extremity injury

نویسندگان English

Ebrahim Soltanabadi
Maliheh Hadadnezhad
Mahdi Khaleghi
University of Khrazmi
چکیده English

Muscle imbalances in the shoulder are a weakness in the external rotator cuff muscles compared to the internal rotator cuffs, in which the weakness of the external rotator cuff muscles is a risk factor for volleyball players' shoulder injuries. Shoulder dyskinesis can be caused by imbalance of the scapula stabilizing muscles, which improves with muscle coordination the aim of this study was to investigate the effect of perturbation training on eccentric strength of external rotators and scapular kinematics. Twenty-four male volleyball players with a score of less than 30 on CKCUEST test participated in this study, which was randomly divided into two groups of experimental and control. The eccentric strength of the external rotator cuff muscles was measured using an isokinetic at 120 degrees per second. Scapular upward rotation also measured with a dual inclinometer at 45 °, 90 °, 135 ° and the end range of motion of the shoulder abduction. Comparing the experimental and control groups, a significant difference was observed in the shoulder external rotators eccentric strength. There was a significant difference only in 135 ° of scapular upward rotation. In other angles, no significant difference was observed between the two groups. The results showed the positive effect of perturbation training on the eccentric strength of external rotators and scapular upward rotation in arm abduction; therefore, coaches and volleyball players can be advised to add these exercises to their training programs to increase performance and prevent shoulder injuries.

کلیدواژه‌ها English

Scapular Kinematics
Shoulder
Rotator Cuff Muscle Strength
Scapular Upward Rotation
Scapular Dyskinesis
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