ارزیابی طیف فرکانس نیروی عکس العمل زمین طی راه رفتن بر روی شن و سطح صاف در افراد با پای پرونیت

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

3 کارشناس ارشد بیومکانیک، گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران

4 استاد فیزیولوژی ورزشی، کارشناس ارشد فیزیولوژی ورزشی، گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

مقدمه و اهداف
طیف فرکانس نیروهای عکس ­العمل زمین طی راه رفتن از اهمیت کلینیکی بالایی برخوردار است. هدف از پژوهش حاضر بررسی طیف فرکانس نیروی عکس ­العمل زمین طی راه رفتن بر روی شن و سطح صاف در افراد با پای پرونیت می­ باشد.
مواد و روش ها
29 فرد سالم (14 زن و 15 مرد) با میانگین سنی 4/17±24/00سال، قد 7/92±170/54 سانتی­متر، و وزن 16/68±73/36 کیلوگرم و 30 فرد با پای پرونیت (15 زن و 15 مرد) با میانگین سنی 2/91±23/09 سال، قد 10/85±172/63سانتی­متر، و وزن 11/07±71/09 کیلوگرم داوطلب شرکت در مطالعه حاضر شدند. داده­ های نیروی عکس­ العمل زمین به ­وسیله دستگاه صفحه نیرو برتک (نرخ نمونه­ برداری 1000 هرتز) اندازه­ گیری شد. از آزمون آنالیز واریانس دوسویه با اندازه­ های تکراری برای تحلیل آماری استفاده شد. تمام تحلیل­ ها در سطح معناداری 0/05 انجام شد.
یافته­ ها
اثر تعاملی سطح و گروه بر طیف فرکانس با توان 99/5 درصد نیروی عکس­ العمل زمین در راستای قدامی-خلفی به لحاظ آماری معنادار بود. طیف فرکانس با توان 99/5 درصد در گروه سالم طی راه رفتن بر روی شن در مقایسه با راه رفتن بر روی سطح صاف به­ طور معناداری بالاتر بود. اختلاف معناداری در سایر متغیرها مشاهده نشد.
نتیجه­ گیری
راه رفتن بر روی شن بر طیف فرکانس با توان 99/5 درصد نیروی عکس­العمل زمین در راستای قدامی-خلفی بیشترین اثر را داشت، ولی در مقادیر طیف فرکانس نیروی عکس ­العمل زمین در راستای داخلی-خارجی و در راستای عمودی هیچ­گونه اختلاف معناداری وجود نداشت. به­ طور کلی، راه رفتن بر روی شن در توانبخشی افراد با پای پرونیت می­ تواند مفید باشد. با وجود این، اثبات هرچه بهتر این موضوع نیاز به انجام پژوهش ­های بیشتر دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of Frequency Spectrum of Ground Reaction Force during Walking on Sand and Flat Surface in Individuals with Pronated Foot

نویسندگان [English]

  • Amirali Jaafarnejad 1
  • Nasrin Amirzade 2
  • Amin Heseinpour 3
  • Marefat Siahkouhian 4
  • Arefeh Mokhtari Malek Abadi 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 MSc of Sport Physiology, Department of Physical Education and Sport Sciences, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardebil, Iran
3 MSc of Sport Biomechanics, Department of Physical Education and Sport Sciences, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardebil, Iran
4 Professor 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: Ground reaction force frequency content during walking has clinical importance. The purpose of the present study was to investigate the frequency response of ground reaction force during walking on sand and flat surface in people with pronation foot.
Materials and Methods: A total of 29 healthy participants (14 females and 15 males) (mean age: 24.00±4.17 years, height: 170.54±7.92 cm, and weight: 73.36±16.68 kg) and 30 individuals with pronated foot (15 females and 15 males) (mean age: 23.09±2.91 years, height: 172.63±10.85 cm, and weight: 71.09±11.07 kg) volunteered to participate in the current study. Ground reaction force data were recorded using a Bertec force plate (with sampling rate of 1000 Hz). Two ways ANOVA with repeated measure test was used for statistical analysis. Data analyses were performed at the significance level of 0.05.
Results: Interactive effect of surface and group on frequency spectrum with power of 99.5% in anterior-posterior direction was statistically significant. Frequency spectrum with power of 99.5% in the healthy group was significantly higher during walking on sand compared to walking on flat surface. No significant difference was observed in other variables.
Conclusion: Walking on sand had the highest effect on the frequency spectrum with power of 99.5% in the anterior-posterior direction but not in the medio-lateral and vertical directions. Generally, walking on sand is suitable in rehabilitation of pronated feet. However, further study is warranted.
 

کلیدواژه‌ها [English]

  • Frequency spectrum
  • Ground reaction force
  • Pronated foot
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