اثر خستگی در نقطه شکست ضربان قلب بر طیف فرکانس نیروهای عکس العمل زمین طی راه رفتن در افراد با پای پرونیت

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری فیزیولوژی ورزشی، گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 استاد فیزیولوژی ورزشی، 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 علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران

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

چکیده

مقدمه و اهداف
پای پرونیت یکی از ناهنجاری­ های اندام تحتانی است که می­تواند منجر به آسیب ­های ناشی از دویدن شود. خستگی ناشی از دویدن یکی دیگر از علل آسیب­ های ناشی از دویدن است؛ بنابراین هدف مطالعه حاضر بررسی اثر تعاملی خستگی ناشی از دویدن در نقطه شکست ضربان قلب و پای پرونیت بر طیف فرکانس نیروهای عکس ­العمل زمین طی راه رفتن بود.
مواد و روش ­ها
در پژوهش حاضر آزمودنی­ ها به ­ترتیب در دو گروه سالم (تعداد=15 نفر) و پای پرونیت (تعداد=15 نفر) قرار گرفتند. یک سیستم صفحه نیرو برتک جهت ثبت نیروهای عکس ­العمل زمین طی راه رفتن با پای برهنه قبل و بعد از خستگی در نقطه شکست ضربان قلب استفاده شد. نیروی عکس­ العمل در جهت­های عمودی، قدامی-خلفی و داخلی-خارجی اندازه­ گیری شد. از آزمون آماری تی مستقل و همبسته جهت مقایسه آماری داده ­ها استفاده شد.
یافته ­ها
یافته­ ها اثر تعاملی معنی­داری را بین گروه و خستگی در فرکانس با توان 5/99 درصد در مولفه­ ی قدامی-خلفی نیروی عکس ­العمل زمین نشان داد (0/030=p؛ 0/181=مجذور اتا). همچنین یافته­ ها اثر تعاملی معنی­ داری را بین گروه و خستگی در فرکانس با توان 99/5 درصد در مولفه­ ی عمودی نیروی عکس­ العمل زمین نشان داد (0/018=p؛ 0/212=مجذور اتا). به ­علاوه، یافته ­ها اثر تعاملی معنی­ داری را بین گروه و خستگی در تعداد هارمونی ­های ضروری مولفه­ ی گشتاور آزاد نشان داد (0/044=p؛ 0/158= مجذور اتا).
نتیجه­ گیری
بر طبق نتایج حاضر، تعامل دو عامل خستگی و پای پرونیت می ­تواند یک ریسک ­فاکتور برای ایجاد آسیب­ های دویدن باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of Fatigue at the Heart Rate Deflection Point on the Frequency Components of Ground Reaction Forces during Walking in Individuals with Pronated Feet

نویسندگان [English]

  • Ahmad Fasihi 1
  • Marefat Siahkouhian 2
  • Hamed Sheikhalizade 3
  • AmirAli Jafarnezhadgero 4
1 PhD Student of Sport Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
2 PhD, Professor of Sport Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
3 MSc of Sport Biomechanics, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
4 PhD, Assistant Professor of Sport Biomechanics, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
چکیده [English]

Background and Aims: A pronated foot is one of the lower limb malalignments which can lead to running related injuries. Another cause of running related injuries is running induced fatigue. The aim of the current study was to investigate the interaction effect of both pronated foot and fatigue at the heart rate deflection point on the frequency spectrum of ground reaction forces during walking.
Materials and Methods: Participants were assigned into two healthy (number=15) and pronated foot (number=15) groups. A Bertec force platform was used to record the ground reaction forces during barefoot walking before and after fatigue in heart rate deflection point. Ground reaction force was measured in vertical, anterior-posterior, and medio-lateral directions. Two way ANOVA with repeated measure was used for statistical analysis.
Results: The results showed significant Group by Fatigue interaction effect for the frequency with power 99.5% in the anterior-posterior ground reaction force (p=0.030, ƞ2=0.181). Also, the significant Group by Fatigue interaction effect for the frequency with the power 99.5% in the vertical direction (p=0.018, ƞ2=0.212) was observed. In addition, findings demonstrated significant Group by Fatigue interaction effect for the number of essential harmonics in the free moment curve (p=0.044, ƞ2=0.158).
Conclusion: According to the results, the interaction of both pronated foot and fatigue could be a risk factor for running injuries.

کلیدواژه‌ها [English]

  • ground reaction force
  • Walking
  • Pronated foot
  • Free moment
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