ارتباط الگوهای هم انقباضی کوادریسپس و همسترینگ با زاویه والگوس زانو در زنان ورزشکار حرفه ای

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار حرکات اصلاحی و آسیب شناسی ورزشی دانشگاه بوعلی سینا، همدان، ایران

2 استاد حرکات اصلاحی و آسیب شناسی ورزشی دانشگاه تهران، ایران

3 دانشیار حرکات اصلاحی و آسیب شناسی ورزشی دانشگاه تهران، ایران

4 دانشیار گروه ارگونومی دانشگاه علوم بهزیستی و توانبخشی، تهران، ایران

5 استادیار حرکات اصلاحی و آسیب شناسی ورزشی دانشگاه تهران، ایران

6 کارشناس ارشد بیومکانیک ورزشی، تهران، ایران

چکیده

زمینه و هدف: زاویه والگوس زانو یکی از عوامل پیش­بین آسیب­های غیربرخوردی لیگامان صلیبی قدامی (ACL) است. هدف تحقیق حاضر بررسی ارتباط بین الگوهای هم انقباضی کوادریسپس و همسترینگ با زاویه والگوس زانو در زنان ورزشکار حرفه­ای بود.  
روش شناسی: 56 زن ورزشکار (با میانگین ± انحراف استاندارد سن 99/1 ±15/20 سال ; قد 25/7 ±28/169 سانتیمتر; وزن 06/10 ±05/60 کیلوگرم) به عنوان آزمودنی در پژوهش شرکت کردند. فعالیت الکترومیوگرافی مدیال و لترال کوادریسپس و همسترینگ و کینماتیک اندام تحتانی حین فرود- پرش ثبت شد. شاخص هم­انقباضی مدیال و لترال کوادریسپس- همسترینگ، نسبت هم­انقباضی مدیال به لترال زانو و زاویه والگوس زانو در لحظه تماس پا با زمین محاسبه و در تحلیل داده­ها مورد استفاده قرار گرفت. برای تعیین ارتباط بین الگوهای هم­انقباضی با زاویه والگوس زانو در لحظه تماس پا با زمین از آزمون همبستگی پیرسون استفاده شد (P≤0.05).
یافته­ ها: یافته­های تحقیق نشان داد بین شاخص هم­انقباضی مدیال کواردیسپس- همسترینگ (001/0 p=) و نسبت هم­انقباضی مدیال به لترال زانو (001/ 0p=) با زاویه والگوس زانو همبستگی معنی­دار وجود دارد. نتایج پژوهش همچنین نشان داد بین شاخص هم­انقباضی لترال کواردیسپس- همسترینگ با زاویه والگوس زانو همبستگی معنی دار وجود ندارد (799/0 p=).
نتیجه­ گیری: بنظر می­رسد زنان ورزشکار هم­انقباضی مدیال به لترال کواردیسپس- همسترینگ نامتعادلی دارند، که توانایی مقابله با بارهای ابداکشن را محدود می­کند. از آنجا که افزایش لود ابداکشن باعث افزایش استرین روی ACL می­شود، به تعادل رساندن هم­انقباضی در بخش مدیال و لترال زانو می­تواند به کاهش آسیب­های ACL کمک کند.
 

کلیدواژه‌ها


عنوان مقاله [English]

Association of quadriceps and hamstrings cocontraction patterns with knee valgus angle in professional female athletes

نویسندگان [English]

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چکیده [English]

Background and purpose: knee valgus angle (KVA) maybe a predictor of non-contact anterior cruciate ligament (ACL) injuries. The purpose of this study was to investigate the relationship between quadriceps and hamstrings cocontraction patterns with knee valgus angle in professional female athletes.  
Methodology: Fifty-six female athletes (mean ± SD age, 20.5 ± 1.99 years; height, 169.28 ± 7.25 cm; body mass, 60.05 ± 10.06 kg) participated. Surface electromyographic data from the medial and lateral hamstrings and quadriceps and lower extremity kinematics were recorded during the drop jump task. Lateral and medial quadriceps-to-hamstrings (Q:H) cocontraction indices, the ratio of medial-to- lateral Q:H cocontraction, normalized root mean square electromyographic data for medial and lateral quadriceps and hamstrings, and knee valgus angle at initial contact were calculated and used in data analyses. Pearson correlation analyses were performed to determine the relationships between quadriceps and hamstrings cocontraction patterns and knee valgus angle at initial contact (P≤0.05).
Results: Medial quadriceps-to-hamstrings (Q: H) cocontraction indices and the ratio of medial-to- lateral Q: H cocontraction were found to be correlated with knee valgus angle (P = 0.001 and P = 0.000, respectively).  No correlation between lateral Q: H cocontraction and knee valgus angle was found (P = 0.799).
Conclusion: Medial-to-lateral Q: H cocontraction appears to be unbalanced in female athletes, which may limit their ability to resist abduction loads. Because higher abduction loads increase strain on the ACL, restoring medial-to-lateral Q: H cocontraction balance in women may help reduce ACL injury risk.
 

کلیدواژه‌ها [English]

  • ACL injury
  • neuromuscular risk factor
  • cocontraction
  • drop jump
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