تاثیر میزان سختی کفی کفش و ارتفاع مختلف فرود بر کینماتیک مفصل زانو هنگام فرود تک پا در مردان

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد بیومکانیک ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه شهید باهنر کرمان، کرمان، ایران

2 استادیار گروه بیومکانیک ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه شهید باهنر کرمان، کرمان، ایران

3 دانشیار گروه بیومکانیک ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه شهید باهنر کرمان، کرمان، ایران

چکیده

مقدمه و اهداف
مهارت­های ورزشی شامل فرود آمدن از فعالیت­های پرخطر ورزشی به شمار می­رود. فرود تک­پا حرکتی رایج در بسیاری از رشته­های ورزشی است و از عوامل اصلی آسیب­های غیربرخوردی ACL شناخته شده است که افزایش حرکت در صفحه فرونتال می­تواند همچنین موجب تشدید آن شود. هدف از انجام تحقیق حاضر بررسی اثر درجات متفاوت سختی کفی (نرم، نیمه­سخت، سخت) بر کینماتیک مفصل زانو (والگوس زانو و فلکشن زانو) هنگام فرود تک­پا از ارتفاع­های متفاوت 20 و 40 و 60 سانتی­متری بود.
مواد و روش ­ها
20 آزمودنی مرد (میانگین جرم: 03/1±30/75 کیلوگرم، قد: 19/4±1/180 سانتی متر، سن: 29/4±30/25 سال) انتخاب شدند. از آزمودنی­ها خواسته شد که با کفی متفاوت از نظر درجات سختی قرار داده شده در کفش، عمل فرود تک­پا را از ارتفاع­های 20 و 40 و 60 سانتی­متری برابر سیستم سه بعدی آنالیز حرکت انجام دهند، و پس از پردازش داده­ها با نرم­افزار کورتکس، پارامترهای حداکثر فلکشن زانو و والگوس زانو محاسبه شد. تحلیل آماری داده­ها با استفاده از آزمون اندازه­گیری­های مکرر در سطح معناداری کمتر از 05/0 انجام گرفت.
یافته­ ها
در فرود از ارتفاع 20 سانتی­متری کفی نرم بیشترین مقدار فلکشن زانو و کمترین مقدار والگوس زانو، ارتفاع 40 سانتی­متری کفی نیمه­سخت بیشترین مقدار فلکشن زانو و کمترین مقدار والگوس و در ارتفاع 60 سانتی­متری کفی سخت بیشترین مقدار فلکشن زانو و کمترین مقدار والگوس زانو را از خود نمایش داد.
نتیجه­ گیری
به طور کلی نتایج نشان داد که درجات متفاوت سختی کفی بر کینماتیک مفصل زانو اثرگذار است، فلکشن بیشتر زانو به همراه والگوس کمتر در این کفی­ها می­تواند باعث کاهش آسیب به لیگامنت صلیبی قدامی شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of Variation in Stiffness of Shoe Insole and Different Height Landing on Kinematics of Knee Joint in Single-Leg Landing in Men

نویسندگان [English]

  • Seyed Ali Abbasi Khaboushan 1
  • Fariborz Mohammadipour 2
  • Mohammad Taghi Amiri Khorasani 3
1 MSc Student in Sport Biomechanics, School of Physical Education and Sport Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
2 Assistant Professor, Department of Sport Biomechanics, School of Physical Education and Sport Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
3 Associated Professor, Department of sport Biomechanics, School of Physical Education and Sport Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
چکیده [English]

Background and Aims: Sport skills include landing from high-risk activities. Single-leg landing is a common movement in many sports and is known a major cause of non-contact Anterior Cruciate Ligament (ACL) injuries, and increase in knee external motion in the frontal plane can also aggravate it. The present study was carried out to analyze the effects of different degrees of insole hardness (soft, medium-hard, hard) on joint kinematics of knee in single-leg landing from different heights including 20, 40, and 60 centimeters.
Materials and Methods: A total of 20 male individuals (mass mean: 75.30± 1.03 kg; height: 180.1± 4.19 cm; age: 25.30± 4.29) were selected. Participants were asked to do single-leg landing from different heights (20, 40, and 60 cm) on different kinds of insole in terms of hardness placed inside the shoes in front of a three-dimensional motion analysis system. After data processing using cortex software, maximum parameters of knee flexion and knee valgus were measured. Statistical analyses of data were done using repeated measures test considering a significant level lower than 0.05.
Results: In landing from 20 cm height, soft insole showed the maximum level of knee flexion and minimum level of knee valgus. In landing from 40 cm height, semi-hard insole showed the maximum level of knee flexion and minimum level of knee valgus. Finally, in landing from 60 cm height, hard insole showed the maximum level of knee flexion and minimum level of knee valgus.
Conclusion: The results showed that different degrees of insole hardness influence the knee joints kinematics. More knee flexion and less knee valgus brought about by these insoles can reduce ACL injuries.

کلیدواژه‌ها [English]

  • Single-Leg Landing
  • Different Heights of Landing
  • Insole Shoe
  • Knee Valgus
  • Kinematics
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