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The effects of feedback exercises on peak vertical Ground Reaction force and Rate of Loading associated with lower extremity injury in landing after volleyball blocks | ||
Sport Sciences and Health Research | ||
مقاله 4، دوره 10، شماره 2، خرداد 2018، صفحه 197-211 اصل مقاله (600.36 K) | ||
نوع مقاله: Research Paper | ||
شناسه دیجیتال (DOI): 10.22059/jsmed.2019.258996.901 | ||
نویسندگان | ||
Anis Rostami1؛ Amir Letafatkar* 2؛ Mehdi Khaleghi tazji2 | ||
1MSc of Sport Injury and Corrective Exercises, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran | ||
2Assistant Professor, Department of Biomechanics and Sport Injury, Faculty of Physical Education and Sport Sciences, Kharazmi University. Tehran, Iran | ||
چکیده | ||
Female volleyball players are 2 to 10 times more likely than men to suffer from the injury of anterior cruciate ligament in motor patterns with decrease in repeated acceleration, landing, and rotation. The aim of the present study was to investigate the effect of 6 weeks of feedback exercises on thepeak vertical ground reaction force and rate of loading associated with lower extremity injury in landing after successful and unsuccessful defense in female university volleyball players. 32 female volleyball players (age range 18-24 years) were selected and randomly divided into feedback (n=16) and control (n=16) groups. The force plate was used to measure the peak vertical ground reaction force and the rate of loading in pretest and posttest. According to the findings, the significance levels were P=0.003 and 0.004 for the first and second peak of the VGRF in stick landing, P=0.005 and 0.012 in step-back landing, P=0.008 and 0.011 for the first and second ROL in stick landing, P=0.002 and 0.016 in the step-back landing. The results of this study showed that feedback exercises had positive effects on the prevention of injury in volleyball players through significant changes in the risk factors of anterior cruciate ligament injury. Therefore, it is suggested to use feedback exercises to reduce those risk factors associated with injuries of the anterior cruciate ligament and to have accurate retention and transfer of safe techniques during the exercise sessions to the competitions. | ||
کلیدواژهها | ||
feedback exercises؛ ground reaction force؛ rate of loading؛ step-back landing؛ stick landing؛ volleyball | ||
عنوان مقاله [English] | ||
تأثیر تمرینات بازخوردی بر اوج نیروی عمودی عکس العمل زمین و نرخ بارگذاری مرتبط با آسیب اندام تحتانی در فرود بعد از دفاع موفق و ناموفق والیبال | ||
نویسندگان [English] | ||
انیس رستمی1؛ امیر لطافت کار2؛ مهدی خالقی تازجی2 | ||
1کارشناسارشد آسیبشناسی و حرکات اصلاحی، دانشکدۀ تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی،تهران-ایران. | ||
2استادیار، گروه بیومکانیک و آسیبشناسی ورزشی، دانشکدۀ تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی،تهران-ایران | ||
چکیده [English] | ||
زنان والیبالیست در الگوهای حرکتی که با کاهش شتاب، فرود و چرخشهای مکرر همراه هستند، 2 تا 10 برابر بیشتر از مردان دچار آسیب لیگامان صلیبی قدامی میشوند.هدف این تحقیق بررسی تأثیر شش هفته تمرین بازخوردی بر اوج نیروی عمودی عکس العمل زمین و نرخ بارگذاری مرتبط با آسیب اندام تحتانی در فرود بعد از دفاع موفق و ناموفق والیبال در زنان والیبالیست دانشگاهی بود. 32 والیبالیست زن با دامنه سنی 18-24 سال، انتخاب شد و بصورت تصادفی در دو گروه، تمرینات بازخوردی (16نفر) و کنترل (16نفر) تقسیمبندی شدند. به منظور اندازهگیری اوج نیروی عمودی عکس العمل زمین و نرخ بارگذاری از صفحه نیرو در دو مرحله پیش آزمون و پس آزمون استفاده شد. براساس یافتههای پژوهش سطح معناداری برای اوج اول و دوم VGRFدر فرود استیک به ترتیب (003/0 و004/0 P=)، در فرود استپ بک بترتیب (005/0 و012/0 P=)، ROL اول و دوم در فرود استیک بترتیب (008/0 و011/0 P=) در فرود استپ بک به ترتیب (002/0 و016/0 P=) گزارش شد. نتایج تحقیق حاضر نشان داد تمرینات بازخوردی با اعمالتغییراتمعناداربر روی عوامل خطر آسیب لیگامان صلیبی قدامی تأثیرات مثبتی در جهت پیشگیری از آسیب در بازیکنان والیبال داشته است. پیشنهاد میشود میتوان برای کاهش عوامل خطر مرتبط با آسیب لیگامان صلیبی قدامی و همچنین یادداری صحیح و انتقال تکنیکهای ایمن در طول جلسات تمرینی به مسابقات از تمرینات بازخوردی بهرهمند شد. | ||
کلیدواژهها [English] | ||
تمرینات بازخوردی, فرود استپ بک, فرود استیک, نرخ بارگذاری, نیروی عکس العمل زمین, والیبال | ||
مراجع | ||
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