آیا هشت هفته تمرین ثباتی می‌تواند میزان فلکشن زانو و نیروی برشی قدامی را تغییر دهد؟

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه آسیب‌شناسی و حرکات اصلاحی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه اصفهان، ایران

2 دانشیار، گروه آسیب‌شناسی و حرکات اصلاحی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه اصفهان، ایران

3 دانشیار، گروه ارتوپد فنی، دانشکده توانبخشی، دانشگاه علوم پزشکی اصفهان، ایران

چکیده

مقدمه و اهداف
آسیب لیگامان متقاطع قدامی اغلب در میان ورزشکارانی که حرکت فرود تک­پا را انجام می­دهند، رایج است. عوامل بیومکانیکی و نیروی برشی قدامی سازوکار اصلی بار وارده به لیگامان متقاطع قدامی هستند. وضعیت اندام تحتانی طی فعالیت می‌تواند باعث افزایش یا کاهش نیروی برشی قدامی ‌شود؛ بنابراین هدف از مطالعه حاضر ارزیابی اثر هشت هفته تمرینات ثباتی بر زاویه فلکشن زانو و نیروی برشی قدامی طی حرکت فرود به منظور پیشگیری از آسیب لیگامان متقاطع قدامی بود.
مواد و روش ­ها
30 ورزشکار بسکتبالیست به طور تصادفی به دو گروه تمرینی و شاهد تقسیم شدند. گروه تمرینی تمرینات ثبات مرکزی را طی هشت هفته انجام دادند، اما گروه شاهد این تمرینات را انجام ندادند. متغیرهای کینتیکی و کینماتیکی اندام تحتانی در پیش­آزمون و پس­آزمون طی فرود تک‌پا، توسط دستگاه تحلیل حرکت و دستگاه صفحه نیرو جمع­آوری شد. برای مقایسه متغیرها از تحلیل واریانس با اندازه‌گیری‌های مکرر در سطح معناداری 05/0>P استفاده شد.
نتایج
نتایج نشان داد که میزان فلکشن زانو در گروه تمرینی متعاقب 8 هفته تمرین به ‌طور معناداری افزایش یافت (05/0P<)؛ اما نیروی برشی قدامی در گروه تمرینی پس از هشت هفته کاهش معناداری پیدا نکرد (05/0P>).
نتیجه ­گیری
بر اساس یافته‌های مطالعه حاضر، تمرینات ثبات مرکزی با افزایش ثبات ناحیه مرکزی بدن، احتمالاً استراتژی فراخوانی عضلات این ناحیه را طی حرکت فرود بهبود داده است؛ بنابراین با توجه به نتایج مطالعه حاضر می‌توان نتیجه گرفت که تمرین ثباتی بخش مرکزی می‌تواند به کاهش عوامل خطر آسیب لیگامان متقاطع قدامی نظیر برخی عوامل بیومکانیکی طی حرکات دینامیکی منجر شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Can Eight Weeks of Stabilization Exercise Change the Amount of Knee Flexion and Anterior Shear Force?

نویسندگان [English]

  • Faraj Fatahi1 Fatahi 1
  • Gholam Ali Ghasemi 2
  • Mohammad Taghi Karimi Taghi Karimi 3
1 PhD Student in Corrective Exercise and Sport Injury, University of Esfahan, Iran
2 Associate Professor in Pathology and Corrective Exercise, School of Physical Education and Sports Sciences, University of Isfahan, Isfahan, Iran
3 Associate Professor, Isfahan University of Medical Sciences, Rehabilitation Faculty, Orthotics and Prosthetics Department, Isfahan, Iran
چکیده [English]

Background and Aim: Anterior Cruciate Ligament (ACL) injury occurs frequently among athletes during single-leg landing and identifying factors which cause the high incidence of ACL injury is of great importance. The biomechanical factors and anterior shear forces are the primary mechanisms of load sustained on the ACL. The lower extremity position during activity may increase or decrease the anterior shear force. Therefore, the objective of the present study was to evaluate the effect of eight-week stabilization training on knee flection and anterior shear force during a drop landing task to prevent ACL injury.
Materials and Methods: A total of 30 basketball athletes were randomly assigned into a training group (n = 15), and a control group (n = 15). Training group performed the Core stability training during eight weeks but control group did not perform these exercises. Lower extremity kinetics and kinematics variables were calculated in pretest and posttest during single leg drop landing using motion analysis and force plat. Data were analyzed using mixed ANOVA repeated measure with the significance level set at P< 0.05.
Results: The results revealed that the amount of knee flexion in the training group significantly increased after eight weeks of training (P< 0.05), but there were no significant reduction in anterior shear forces (P> 0.05).
Conclusion: Based on the findings of the current study, core stability training with increasing core stability has probably improved muscles recruitment strategy during drop landing. Therefore, according to the results of the present study, we can conclude that stabilization training can result in the reduction of risk factors of ACL injury including biomechanical and factors during dynamic movemen
 

کلیدواژه‌ها [English]

  • Stabilization Training
  • Kinetics
  • Kinematics
  • Single Leg Drop Landing
  • Injury prevention
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