مطالعات طب ورزشی

تاثیر خستگی القایی بر متغیرهای نیروی عمودی عکس العمل زمین و میزان بار وارد شده هنگام فرود متقاطع

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، گروه تربیت‌بدنی و علوم ورزشی، دانشکدۀ علوم انسانی، دانشگاه آزاد اسلامی واحد همدان، همدان، ایران

2 استادیار، گروه تربیت‌بدنی و علوم ورزشی، دانشکدۀ علوم انسانی، دانشگاه آزاد اسلامی واحد همدان، همدان، ایران

چکیده
هدف از مطالعۀ حاضر، بررسی اثر خستگی القاشده بر مؤلفه‌های نیروی عکس‌العمل و نرخ بارگذاری در حین فرود بود. ۱۵ نفر مرد سالم در این مطالعه شرکت کردند. نقاط اوج و فرود نیروی عکس‌العمل، زمان رسیدن به آن‌ها و نرخ بارگذاری در آزمودنی‌ها، قبل و بعد از خستگی با صفحه نیروی کیستلر استخراج شدند. نتایج مؤید کاهش حداقلی نیروی عمودی عکس‌العمل در تماس پنجۀ پا با زمین و افزایش حداقل نیروی عمودی عکس‌العمل در تماس پاشنۀ پا با زمین (Fz4) بود. همچنین نتایج نشان داد در افرادی که در معرض خستگی قرار دارند، زمان رسیدن به حداقل نیروی عمودی عکس‌العمل در تماس پاشنه با زمین سریع‌تر است. تغییر مؤلفه‌های نیروی عکس‌العمل و زمان رسیدن سریع‌تر به نیروی عکس‌العمل عمودی هنگام تماس پا با زمین خود عاملی خطرزا در پرش یا فرودها تلقی می‌شوند. بنابراین ارائۀ راه­کارهای پیشگیری از این عامل خطر می‌تواند نقشی بسیار مهم ایفا کنند. بنابراین، پیشنهاد می‌شود بازخورد حاصل از تغییرات این پارامترهای بیومکانیکی مکمل راه­کارهای درمان و پیشگیری از این عوامل خطر در فعالیت و بازتوانی درمانگران، فیزیوتراپ‌ها و سایر گروه‌ها شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله English

Effect of induced fatigue on ground reaction force components and loading rate during Single Leg Crossover

نویسندگان English

  • Mohammad Reza Jahani 1
  • Ali Jalalvand 2
1 Department of Sport Biomechanics, Hamedan Branch, Islamic Azad University, Hamedan, Iran
2 Department of Sport Biomechanics, Hamedan Branch, Islamic Azad University, Hamedan, Iran
چکیده English

The aim of this study was to investigate the effect of exercise-induced fatigue on vertical ground reaction force and loading rate during crossover landing. To do so, 15 healthy men participated in this study. Peak and landing values of ground reaction forces (GRFs), time to reach them and loading rate in participants before and after were extracted using Kistler force plate. Results showed that the amplitude of the second vertical peak in force (Fz2) (landing GRFs) reduced at toe contact with the ground but the amplitude of the fourth vertical peak in force (Fz4) (landing GRFs) increased at heel contact with the ground. In the fatigued conditions, subjects had faster time to peak of FZ4. Changing the components of GRF and the time to peak of faster to vertical GRF when contacting feet with your ground as a risk factor in the jump or landing. Therefore, providing strategies for preventing this risk factor can play a very important role. Thus, it is suggested that feedback due to changes in these biomechanical parameters complement the treatment and prevention of these risk factors in the activity and rehabilitation of therapists, physiotherapists and other groups.

کلیدواژه‌ها English

  • Exercise-induced fatigue
  • landing
  • ground reaction forces
  • loading rate
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  • تاریخ دریافت 01 خرداد 1400
  • تاریخ بازنگری 06 شهریور 1400
  • تاریخ پذیرش 17 شهریور 1400

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