فعالیت الکترومیوگرافی عضلات اطراف زانو طی فرود تک پا در زنان ورزشکار با و بدون والگوس پویای زانو

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، آسیب شناسی ورزشی و حرکات اصلاحی، دانشکده تربیت بدنی، دانشگاه بوعلی سینا، همدان، ایران.

2 استادیار، گروه آسیب شناسی ورزشی و حرکات اصلاحی، دانشکده تربیت بدنی، دانشگاه بوعلی سینا، همدان، ایران.

چکیده

مقدمه و اهداف
آسیب ACL یکی از آسیب­های جدی و پرهزینه است که از آن به­عنوان کابوس ورزشکاران نام برده شده است. افزایش زاویه والگوس زانو در خلال حرکات پویا نظیر فرود و اسکات یکی از عوامل خطرآفرین آسیب زانو و کاهش بازده مکانیکی حرکت است. هدف مطالعه حاضر مقایسه فعالیت فیدفورواردی عضلات زانو ورزشکاران زن با و بدون والگوس داینامیک زانو در طی فرود تک‌پا است.
مواد و روش­ ها
در پژوهش حاضر، 32 زن ورزشکار به‌عنوان آزمودنی شرکت کردند که در دو گروه سالم و والگوس (زاویه والگوس بیشتر از 12 درجه) قرار داده شدند. فعالیت فیدفورواردی عضلات همسترینگ داخلی، همسترینگ خارجی، واستوس داخلی، واستوس خارجی، دوقلوی داخلی و دوقلوی خارجی این افراد در حین فرود تک‌پا با پای برتر از ارتفاع 50 سانتی‌متری ثبت شد. فعالیت فیدفورواردی عضلات در 150 میلی‌ثانیه قبل از تماس پا با زمین اندازه‌گیری شد. برای تجزیه‌وتحلیل داده‌ها از آزمون تحلیل واریانس چندمتغیره (MANOVA) با سطح معناداری 0/05≤p استفاده شد.
یافته­ ها
یافته‌های تحقیق حاضر نشان داد فعالیت فیدفورواردی عضلات خارجی زانو در افراد با والگوس داینامیک زانو نسبت به افراد سالم بیشتر است (05/05<p). در مورد عضلات داخلی زانو (واستوس داخلی، همسترینگ داخلی و دوقلو داخلی) نتایج حاکی از عدم تفاوت بین دو گروه بود (0/05>p).
نتیجه ­گیری
به نظر می‌رسد فعالیت فیدفورواردی عضلات خارجی زانو در زنان ورزشکار دارای والگوس داینامیک زانو در مقایسه با ورزشکاران زن سالم بیشتر از عضلات داخلی زانو است که این موضوع والگوس زانو را در حین فعالیت‌های پویا افزایش می‌دهد؛ در نتیجه ریسک آسیب ACL در این افراد افزایش می‌یابد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Electromyographic Activity of the Knee Muscles during Single-Leg Landing in Female Athletes with and without Dynamic Knee Valgus

نویسندگان [English]

  • Farzaneh Ramezani 1
  • Farzaneh Saki 2
1 Master of sport injury and corrective exercises, Faculty of physical education and sports sciences, Bu-Ali Sina University, Hamadan, Iran.
2 Assistant professor of sport injury and corrective exercises, Faculty of physical education and sports sciences, Bu-Ali Sina University, Hamadan, Iran.
چکیده [English]

Background and Aims: ACL injury is one of the most serious and expensive injuries that is a nightmare for athletes. Increasing the knee valgus angle during dynamic movements such as landing and squat is one of the risk factors for knee injury and decreased mechanical efficiency of movement. The aim of the current study was to compare the preparatory knee muscle activity of female athletes with and without dynamic knee valgus during a single leg landing.
Materials and Methods: In the current quasi-experimental study, 32 female athletes were divided into two groups of healthy and dynamic knee valgus. Feed forward activities of Medial Hamstring, Lateral Hamstring, Vastus Medialis, Vastus Lateralis, Medial Gastrocnemius, and Lateral Gastrocnemius were recorded during a single-leg landing with the dominant leg on top of a 50-cm box. Muscle feed forward activity was measured since 150 ms prior to ground contact. Multivariate analysis of variance with a significance level of p≤0.05 was used for data analysis.
Results: The findings of the present study showed that the preparatory Lateral knee muscle activities (Lateral Hamstring, Vastus Laterals, Lateral Gastrocnemius) in participants with dynamic knee valgus was higher than those of healthy individuals (p <0.05). In the case of Medial knee muscles, the results showed no difference between the two groups (p> 0.05).
Conclusion: According to the results, the preparatory Lateral knee muscle activity was more than that of medial knee muscles in female athletes with dynamic knee valgus compared to healthy female athletes, which increases the risk of knee valgus during dynamic activities, As a result, they are at a higher risk of ACL injury.             

کلیدواژه‌ها [English]

  • ACL injury
  • neuromuscular risk factors
  • feed forward
  • Single-leg landin
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