مطالعه اثر خستگی عضلات ناحیه مرکزی بدن بر مکانیک فرود و عملکرد اندام تحتانی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دکتری حرکات اصلاحی و آسیب شناسی، گروه حرکات اصلاحی و آسیب شناسی، دانشکده تربیت بدنی، دانشگاه رازی، کرمانشاه، ایران

2 کارشناسی ارشد حرکات اصلاحی و آسیب شناسی، گروه حرکات اصلاحی و آسیب شناسی، دانشکده تربیت بدنی، دانشگاه رازی، کرمانشاه، ایران

چکیده

مقدمه و اهداف
هدف از مطالعه حاضر، پرداختن به مسئله خستگی عضلات ناحیه مرکزی بدن و نقش احتمالی آن در تغییر مکانیک فرود و عملکرد اندام تحتانی بود.
مواد و روش­ ها
در مطالعه نیمه­ تجربی حاضر، 18 دانشجوی ورزشکار دختر از بین دانشجویان تربیت بدنی دانشگاه رازی، به روش نمونه­ گیری تصادفی انتخاب شدند. جهت ارزیابی عملکرد اندام تحتانی در پیش ­آزمون و پس ­آزمون, چندین تست استفاده شد. از تست Y برای سنجش تعادل پویا، تست مربع و جهش جانبی برای ارزیابی عملکرد، دامنه دورسی فلکشن مچ پا و جهت ارزیابی مکانیک فرود از پرسش­نامه سیستم نمره­دهی خطای فرود و نرم­افزار کاینوا و اتوکد استفاده گردید. بعد از انجام پیش­آزمون­ها، پروتکل خستگی ناحیه مرکزی بدن اعمال و به دنبال آن پس­آزمون به عمل آمد. از آزمون­های آماری K-S، Leven و جهت مقایسه ­میانگین­ها از آزمون آماری t-زوجی در سطح معناداری 05/0 استفاده گردید.
یافته­ ها
یافته­ های حاصل از مطالعه حاضر نشان داد پس از اعمال پروتکل خستگی ناحیه مرکزی بدن، نمرات خطای فرود (001/0P=)، دامنه دورسی فلکشن مچ پا در تحمل وزن (002/0P=)، تعادل پویا (02/0P=) و فلکشن زانو در لحظه فرود (03/0P=) دچار افت می­ شود.
نتیجه­ گیری
با توجه به افت عملکرد اندام تحتانی و تغییر مکانیک فرود به دنبال خستگی عضلات ناحیه مرکزی بدن، می­توان اذعان نمود که احتمالاً خستگی ناحیه مرکزی که در حین رقابت­ های ورزشی رخ می­دهد، می­تواند زمینه بروز آسیب ­های اندام تحتانی را فراهم آورد؛ بنابراین اعمال پروتکل­ های تقویت ناحیه­ ی مرکزی می­تواند زمینه­ی پیشگیری از آسیب­ های اندام تحتانی باشد. 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of Core Muscles Fatigue on Landing Mechanic and Lower Extremity Function

نویسندگان [English]

  • Farzaneh Gandomi 1
  • Maryam Najafi 2
1 Ph.D of Sport Injuries and Corrective Exercises, Department of Sport Injuries and Corrective Exercises, Razi University, Kermanshah, Iran
2 MSc of Sport Injuries and Corrective Exercises, Department of Sport Injuries and Corrective Exercises, Razi University, Kermanshah, Iran
چکیده [English]

Background and Aim: The purpose of the present study was to investigate the effect of core muscles’ fatigue on landing mechanic and lower extremity function.
Materials and Methods: In the present semi-experimental study, 18 female students were randomly selected from among the students at Razi University. First, pretests were administered. Y-test was used to measure dynamic balance, square & lateral hop tests was used to measure lower extremity function, and weight bearing dorsiflexion ROM and Landing Error Scoring System-Real Time as well as Kinova and AutoCAD Software were used to assess landing mechanic. After the pretest, we perfromed core muscles fatigue protocol and then the posttest was conducted. For data analysis, K-S and Levine’s test and paired sample t-test were run. The statistical significance was set at 0.05.
Results: The results showed that after core muscles fatigue, among studied factors, landing error scores (P=0.001), weight bearing dorsiflexion ROM (P=0.002), dynamic balance (P=0.02), and knee flexion angle (P=0.03) decreased in contact time.
Discussion: According to the results, it can be stated that the core muscles fatigue that accrues in sports competitions could result in the prevalence of lower extremity injuries. So, core strengthening protocol can be effective in preventing injuries in the lower extremity.

کلیدواژه‌ها [English]

  • Landing mechanic
  • Lower extremity performance
  • Core muscles fatigue
  • Weight bearing dorsiflexion ROM
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