اثر ارتز نیمه سخت بر سفتی مفاصل اندام تحتانی طی راه رفتن در کودکان پسر دارای کف پای صاف

نوع مقاله: مقاله پژوهشی

نویسندگان

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

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

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

10.22037/jrm.2019.111501.2036

چکیده

مقدمه و اهداف
هدف از پژوهش حاضر بررسی اثر ارتز نیمه­ سخت بر سفتی مفاصل اندام تحتانی (مچ پا، زانو و ران) در سه بعد ساجیتال، فرونتال و هوریزنتال و در زیر فازهای پاسخ بارگیری، میانه اتکا، هل دادن و کل فاز اتکا در افراد دارای کف پای صاف طی راه رفتن بود.
مواد و روش ­ها
پژوهش حاضر از نوع تحقیق نیمه ­تجربی می­باشد. 14 کودک (پسر) دارای کف پای صاف از طریق روش نمونه ­گیری در دسترس برای شرکت در پژوهش انتخاب شدند. داده­ ها تحت دو شرایط ویژه (راه رفتن با کفش بدون ارتز و کفش با ارتز) جمع­آوری شد. ارتز مورد استفاده در پژوهش حاضر از نوع نیمه­ سخت بود. اطلاعات کینماتیکی راه رفتن با استفاده از 6 دوربین وایکان و با فرکانس نمونه­برداری 100 هرتز جمع­آوری شد. از دو عدد صفحه نیرو با فرکانس نمونه ­برداری 1000 هرتز برای ثبت داده­های نیروی عکس­العمل زمین استفاده شد. مقادیر سفتی مفاصل اندام تحتانی در سه بعد طی راه رفتن مورد محاسبه قرار گرفت.
یافته­ ها
در مفصل مچ پا ارتز نیمه ­سخت سبب کاهش معنادار مقدار سفتی در صفحه ی ساجیتال طی زیرفاز پاسخ بارگیری (003/0P=) و افزایش سفتی در صفحه هوریزنتال طی زیرفاز هل دادن (001/0P=) گردید. به­علاوه، طی کل فاز اتکا و در صفحات ساجیتال (033/0P=) و هوریزنتال (039/0P=) به ترتیب ارتز سبب کاهش و افزایش معنادار سفتی مفصل مچ پا شد. استفاده از ارتز نیمه­سخت سبب کاهش مقدار سفتی مفصل زانو طی زیرفاز میانه­ی اتکا در صفحه­ی ساجیتال (014/0P=) و افزایش مقادیر سفتی این مفصل در صفحه هوریزنتال طی زیرفاز میانه­ی اتکا (000/0P=)، زیرفاز هل دادن (001/0P=) و کل فاز اتکا (001/0P=) شد. ارتز نیمه­سخت طی زیرفاز پاسخ بارگیری در صفحه­ی فرونتال سبب افزایش سفتی مفصل ران (044/0P=) شد.
نتیجه­ گیری
به طور کلی، ارتز نیمه­سخت سفتی مفصل مچ پا را در صفحه­ ی ساجیتال بهبود بخشید و سبب افزایش سفتی مفاصل مچ پا و زانو در صفحه ­ی هوریزنتال شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Influence of Semi-Rigid Foot Orthoses on Lower Limb Joints Stiffness in Male Children with Flexible Flatfoot during Walking

نویسندگان [English]

  • Amiali Jaafarnejad 1
  • Seyede Maryam Anvari 2
  • Farzane Nasirpour 3
1 Assistant Professor of Sport Management, Department of Physical Education and Sport Sciences, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
2 Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran.
3 MSc in Sport Biomechanics, Department of Physical Education and Sport Sciences, Faculty of Psychology and Educational Sciences, Mohaghegh Ardabili University of Ardabil, Ardabil, Iran
چکیده [English]

Background and Aims: The aim of the present study was to investigate the effect of semi-rigid foot orthoses on lower limb joints (ankle, knee, and hip) stiffness during loading response, mid stance, push off, and entire of stance phase in male children with flexible flatfoot while walking.
Materials and Methods:A semi-experimental study was conducted on 14 male children with flexible flat foot selected from available community. Data were collected under two specific test conditions including walking in shoes and shoes which were embedded with foot orthoses using semi rigid orthoses. Six Vicon cameras with a frequency of 100 Hz were used to quantify gait kinematic and also two force plates were used to record the ground reaction force components. Three-dimensional lower limb stiffness values during walking were calculated. 
Results: Foot orthoses reduced ankle joint stiffness during loading response in sagittal plane (p=0.003) and increased it during push off phase in horizontal plane (p=0.001). Also, during the entire stance phase, foot orthoses reduced ankle joint stiffness in sagittal plane (p=0.033) and increased it in horizontal plane (p=0.039). In the knee joint, stiffness values during mid-stance in sagittal plane (p=0.014) decreased after using foot orthoses. Furthermore foot orthoses increased knee joint stiffness values in horizontal plane during mid stance (p=0.000), push off (p=0.001), and stance phases (p=0.001). Hip joint stiffness was increased in frontal plane (p=0.044) during loading response by foot orthoses.
Conclusion: Generally, semi rigid orthoses improved the ankle joint stiffness values in sagittal plane and it increased the ankle and knee joints stiffness values in horizontal plane.

کلیدواژه‌ها [English]

  • Joints stiffness
  • Semi-rigid orthoses
  • Flatfoot
  • Walking
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