نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار دانشگاه بوعلی سینا همدان

2 کارشناس ارشد دانشگاه بوعلی سینا همدان

چکیده

هدف پژوهش حاضر، بررسی تأثیر تغییر ارتفاع پاشنه پا روی فعالیت عضلات منتخب (با تاکید بر پدیده هم‌انقباضی) و زاویۀ مفاصل در حرکت اسکات بود. دامنۀ حرکتی مفاصل و فعالیت عضلات دوقلو داخلی، درشت‌نئی قدامی، راست‌رانی، پهن داخلی، پهن خارجی، دو سر‌رانی، نیم‌وتری و باز کننده ستون فقرات 10 مرد فعال حین اجرای حرکت اسکات در چهار وضعیت ۰، ۲، ۳ و ۵ سانتی‌متری ارتفاع پاشنه پا جمع آوری شد. کاهش معناداری در فعالیت عضله درشت‌نئی قدامی با افزایش ارتفاع پاشنه مشاهده، در حالیکه میزان فعالیت سایر عضلات با تغییر ارتفاع پاشنه معنادار نبود. همچنین کاهش در هم‌انقباضی عمومی عضلات مفصل مچ پا در ارتفاع ۳ سانتی‌متری مشاهده شد که می‌تواند نشانه‌ای از کاهش فشار بر مفصل مچ پا در این وضعیت باشد. بنابراین، قرار گرفتن پاشنه پا در ارتفاع ۳ سانتی‌متری برای اجرای حرکت اسکات با اهداف توانبخشی و بدنسازی توصیه می‌شود، .

کلیدواژه‌ها

عنوان مقاله [English]

The effect of heel height variations on selected muscles activity and joint angle during squat exercise

نویسندگان [English]

  • Mehrdad Anbarian 1
  • Mohammad Javad Razi 2

چکیده [English]

The purpose of this study was to examine the effect of heel height variations on selected muscles activity (with emphasize on co-contraction) and joint angle during squat exercise. Joint range of motion and electromyographic activity from medial gastrocnemius, tibialis anterior, rectus femoris, vastus medialis, vastus laterlis, biceps femoris, semitendinosus and erector spinae muscles of ten active males were recorded while performed squat exercise at 0, 2, 3 and 4 cm of heel height conditions. A reduction activity was observed for tibialis anterior muscle while heel height, but there was no significant differences for the other muscles. There was a lower general co-contraction of the ankle joint muscles at 3 cm heel height condition that could minimize the perturbing effects of external loads on ankle during squat exercise. Therefore, performing squat exercise at 3 cm height condition could be recommended as a suitable position for both rehabilitation and sport applications purposes,

کلیدواژه‌ها [English]

  • Squat exercise
  • Heel height
  • Electromyograp
  • Joint range of motion
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