مقایسه فعالیت الکترومایوگرافیک عضلات تنه و ران حین پرش-فرود تک پا در مردان با و بدون زانوی پرانتزی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناس ارشد آسیب شناسی ورزشی و حرکات اصلاحی، گروه حرکات اصلاحی و طب ورزش، دانشکده تربیت بدنی، دانشگاه علامه طباطبائی. تهران، ایران

2 استادیار گروه حرکات اصلاحی و آسیب شناسی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه علامه طباطبائی، تهران، ایران

چکیده

مقدمه و اهداف
امروزه زانوی پرانتزی یکی از شایع­ترین ناهنجاری­های اندام تحتانی است، اما بیومکانیک اندام و همچنین فعالیت عضلات در حین فعالیت­های وابسته به ورزش در این افراد کمتر مورد توجه قرار گرفته است. هدف از انجام تحقیق حاضر، مقایسه فعالیت الکتریکی عضلات تنه و ران حین پرش-فرود در مردان با و بدون زانوی پرانتزی می­باشد.
مواد و روش ­ها
در تحقیق مقطعی حاضر،30 نفر ورزشکار (15 نفر با زانوی پرانتزی و 15 نفر بدون آن) شرکت کردند. زانوی پرانتزی با استفاده از کالیپر مخصوص استخوان با دقت 0.01 میلی­متر اندازه­گیری شد. آزمودنی­ها حرکت پرش-فرود را روی صفحه نیرو (مدل Ver 3.0.2 ساخت شرکت دانش سالار ایرانیان) انجام دادند. فعالیت عضلات با استفاده از دستگاه الکترومیوگرافی ثبت و 100 میلی­ثانیه بعد از لحظه برخورد استخراج شد. برای تجزیه و تحلیل داده ها از برنامه متلب و آزمون T مستقل با سطح معناداری 05/0P≤ استفاده گردید.
یافته­ ها
یافته­ها نشان داد تفاوت معناداری در فعالیت عضلات دوسررانی و نیم­وتری بین دو گروه مشاهده نشد، اما در میزان فعالیت عضلانی سرینی میانی )001/0=(P و مربع کمری )002/0=(P بین دو گروه تفاوت معناداری مشاهده شد.
نتیجه­ گیری
به نظر می‌رسد واروس زانو عاملی اثرگذار بر بیومکانیک پرش-فرود باشد، به طوری که باعث کاهش فعالیت عضلات سرینی میانی و مربع کمری می­شود. این تغییرات ممکن است با کاهش ثبات طرفی و افزایش احتمال آسیب­دیدگی در ورزشکاران همراه باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Comparison of the Electromyographic Activity of Trunk and Hip Muscles during the Single Leg Jump-Landing in Men with and without Genu Varum

نویسندگان [English]

  • Hashem karamvisi 1
  • Farideh Babakhani 2
  • Rahman Sheikhhoseini 2
1 MA Student in Sport Injury and Corrective Exercises, Department of Sports Injury and Corrective Exercises, Allameh Tabataba University. Tehran, Iran.
2 Assistant Professor, Department of Sports Injury and Corrective Exercises, Allameh Tabatabai University, Tehran, Iran
چکیده [English]

Background and Aims: Genu Varum is one of the most common malalignments of lower limb but not a lot of attention have been paid to the biomechanics of lower extremities and the muscle activities while performing the sport specific tasks in the persons. The aim of the present study was to compare the Electromyographic activity of trunk and hip muscles during the single leg jump-landing in men with and without Genu Varum.
Materials and Methods: A total of 30 athletes (15 with genu Verum and 15 without this malalignment) participated in the current cross-sectional study. Genu Varum was assessed using Bone Caliper with the accuracy of 0.01 mm. Participants performed the jump-landing on a forces Plate (Model ver 3.0.2, Danesh Salar Iranian Co.). The electromyography activities of muscles were recorded using the EMG and 100 milliseconds before and after the initial contact. MATLAB software was used for data analysis. For the statistical analysis, the independent t-test with the significance level of o≤0.05 was used.
Results: There were no significant differences in the activity of biceps femoris and semitendinosus muscles between the two groups, but there were significant differences in the mean values of gluteus Medius (P=0.001) and quadratus lumborum (P=0.002) activity between the groups (P<0.05).
Conclusion: According to the results, it seems that the Genu Varum is effective on the biomechanics of jump-landing and it is associated with reduced activity in the gluteus Medius and quadratus lumborum muscles. These changes may be associated with reduced lateral stability and increased risk of injuries in the athletes.

کلیدواژه‌ها [English]

  • Electromyography
  • Lower extremity
  • Genu varum
  • Athletes
  • Force plate
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