بررسی اثر بریس زانو بر طیف فرکانس نیروهای عکس العمل زمین طی حرکت فرود از دو ارتفاع 30 و 50 سانتی متری در ورزشکاران دارای آسیب رباط صلیبی قدامی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 ستادیار بیومکانیک ورزشی، گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران

3 دانشجوی کارشناسی ارشد فیزیولوژی ورزشی، گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

مقدمه و اهداف
آسیب­های رباط، شایع­ترین آسیب­های زانو و همچنین رباط صلیبی قدامی بیشترین آسیب رباط­های حمایت­کننده زانو را شامل می­شود. هدف پژوهش حاضر بررسی اثر بریس زانو بر طیف فرکانس نیروی عکس­العمل زمین طی حرکت فرود از دو ارتفاع 30 و 50  سانتی­متری در ورزشکاران دارای آسیب رباط صلیبی قدامی بود.
مواد و روش ­ها
15 ورزشکار دارای آسیب رباط صلیبی قدامی (20-30 سال) (قد: 02/0±75/1 متر؛ وزن: 54/6±00/70 کیلوگرم؛ شاخص توده بدنی (BMI): 29/23 کیلوگرم بر متر مربع) داوطلب شرکت در آزمون شدند. آزمون فرود از دو ارتفاع 30 و 50  سانتی­متری انجام شد. از بریس زانوی Xeleton مدل 50K30 برای آزمون و از صفحه­نیروی برتک برای ثبت نیروهای عکس­العمل زمین استفاده شد. از آزمون ویلکاکسون برای تحلیل آماری استفاده شد. تمام تحلیل­ها در سطح معناداری 05/0 و با استفاده از نرم­افزار SPSS نسخه 25 انجام شد.
یافته­ ها
یافته­ها در راستای داخلی-خارجی و تعداد هارمونی ضروری کاهش معناداری را به اندازه 82/1 درصد نشان داد (024/0=p). همچنین نتایج به دست آمده در راستای قدامی-خلفی و در متغیر میانه فرکانس این راستا افزایش معناداری را به اندازه 46/195 درصد نشان داد (025/0=p).          
نتیجه­ گیری
استفاده از بریس در ورزشکاران دارای آسیب رباط صلیبی قدامی بیشترین اثر را روی تعداد هارمونی ضروری در راستای داخلی-خارجی و میانه فرکانس در راستای قدامی-خلفی داشت. از این رو طراحی بریس زانو با خاصیت کاهش سایر مولفه­های طیف فرکانس در ورزشکاران آسیب­دیده جهت بازگشت زود هنگام آنها به میادین و مسابقات ورزشی پیشنهاد می­شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of Knee Brace on Frequency Spectrum of Ground Reaction Forces during Landing from Two Heights of 30 and 50 cm in Athletes with Anterior Cruciate Ligament Injury

نویسندگان [English]

  • Aidin Valizadeorang 1
  • Farshad Ghorbanlou 1
  • AmirAli Jafarnezhadgero 2
  • Milad Alipoor Sarinasilou 3
1 Assistant Professor, Sport physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
2 Assistant Professor, Sport Biomechanic, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
3 Master of Science Student of Sport Physiology, Department of Physical Education and Sport Sciences, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardebil, Iran
چکیده [English]

Background and Aims: The purpose of the present study was to evaluate the effect of knee brace on frequency spectrum of ground reaction forces during landing movement from two heights of 30 and 50 cm in athletes with anterior cruciate ligament injury.
Materials and Methods: A total of 15 athletes with ACL injury volunteered to participate in the study. The landing tests were performed from heights of 30 and 50 cm. Ground reaction forces were recorded before and after using knee brace making use of Bertec force platforms. Also, Wilcoxon test was used for statistical analysis.
Results: The number of essential harmonics in medio-latral direction during brace condition decreased by 1.82% (P = 0.024). Also, the median frequency in anterior-posterior direction showed a significant increase of 195.46% during brace condition (P = 0.025).
Conclusion: The use of brace in anterior cruciate ligament injury athletes had the greatest effect on the essential number of harmonics along the medio-latral direction and median frequency in the anterior-posterior direction. The novel knee brace could be designed to reduce other components of ground reaction force frequency domain in injured athletes with aim of early return to sports competitions.

کلیدواژه‌ها [English]

  • knee brace
  • frequency spectrum
  • landing
  • Anterior Cruciate ligament
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