تأثیر خستگی عضلات چهارسررانی بر فعالیت الکترومایوگرافی عضلات اندام تحتانی هنگام برداشتن بار

نویسندگان

1 کارشناس ارشد گروه بیومکانیک ورزشی، دانشکده علوم ورزشی، دانشگاه بوعلی سینا، همدان، ایران.

2 استاد گروه بیومکانیک ورزشی، دانشکده علوم ورزشی، دانشگاه بوعلی سینا، همدان، ایران.

چکیده
مقدمه و هدف: هدف این مطالعه، ارزیابی تأثیر خستگی موضعی عضلات چهارسررانی بر فعالیت الکترومایوگرافی عضلات منتخب اندام تحتانی هنگام بلند کردن بار با تکنیک­های مختلف بود.

روش: فعالیت الکترومایوگرافی سطحی عضلات راست­رانی، پهن خارجی، پهن داخلی، دوسررانی، نیم­وتری، دوقلو و درشت‌نئی قدامی 20 زن هنگام بلند کردن بار با تکنیک‌­های اسکوات، استوپ و استرادل با 20% وزن بدن قبل و پس از خستگی عضلات چهارسرران با استفاده از دستگاه پرس پا، ثبت شد. از روش آماری آنالیز واریانس با اندازه‌های تکراری برای تجزیه‌وتحلیل داده­ها استفاده شد (p<0.05).

یافته‌ها: پس از خستگی، فعالیت عضلات راست رانی، پهن داخلی، دوسررانی و دوقلو در تکنیک‌های اسکوات و استوپ به‌طور معنا‌داری در مقایسه با قبل از خستگی متفاوت بود؛ اما تفاوت معناداری بین فعالیت هیچ‌یک از عضلات قبل و پس از خستگی در روش استرادل مشاهده نشد.

نتیجه‌­گیری نهایی: با توجه به نتایج به نظر می‌رسد که هنگام خستگی عضلات چهارسررانی، استفاده از تکنیک استرادل برای بلند کردن بار مناسب‌تر باشد.




کلیدواژه‌ها


عنوان مقاله English

Effects Of Quadriceps Muscle Fatigue On Electromyography Activity Of Lower Limb Muscles During Lifting Load

نویسندگان English

Masume Fadaei 1
Mehrdad Anbarian 2
1 M.A. Department of Sport Biomechanics, Faculty of Sport Sciences, Bu-Ali Sina University, Hamedan, Iran.
2 Professor, Department of Sport Biomechanics, Faculty of Sport Sciences, Bu-Ali Sina University, Hamedan, Iran.
چکیده English

Background and Aims: The purpose of this study was to evaluate the effect of quadriceps muscle fatigue on electromyographic activity of selected lower limb muscles during lifting loads using different techniques.

Methods: Surface electromyography activity of the rectus femoris, vastus latralis, vastus medialis, biceps femoris, semitendinous, gastrocnemius medialis and tibialis anterior muscles of 20 able-bodied women were recorded before and after the quadriceps muscle fatigue using leg-press movement, squat, stoop and strudel techniques with 20% of body weight. Analysis of Variance with repeated measures was used for data analyses (p<0.05).

Results: After fatigue when lifting the load, the activity of the rectus femoris, vastus medialis, biceps femoris and gastrocnemius medialis in squat and stoop techniques was significantly different compared to before fatigue condition. But no significant difference was observed between the activity of any of the muscles before and after fatigue in the straddle method.

Conclusion: According to the results, it seems that when quadriceps muscle fatigue, the use of straddle technique to lift the load is more appropriate.


کلیدواژه‌ها English

Lifting Technique
Ergonomics
Muscle Activity
Muscle Fatigue
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