مطالعات طب ورزشی

ارزیابی نسبت فعالیت الکترومیوگرافی عضلۀ پهن داخلی مایل به پهن خارجی بعد از تمرینات مقاومتی درونگرا و برونگرا

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه فیزیولوژی ورزشی، واحد محلات، دانشگاه آزاد اسلامی، محلات، ایران

2 استاد، گروه فیزیولوژی ورزشی، واحد محلات، دانشگاه آزاد اسلامی، محلات، ایران

3 دانشیار بیومکانیک و کنترل حرکتی، گروه علوم ورزشی، دانشگاه بجنورد، بجنورد، ایران

چکیده
هدف از مطالعۀ حاضر، بررسی اثر برنامۀ تمرینی قدرتی مقاومتی برونگرا و درونگرا روی نسبت فعالیت عضلۀ پهن داخلی مایل به پهن خارجی بود. 26 مرد سالم  در این مطالعه  شرکت کردند. پروتکل تمرینی شامل 36 جلسه تمرین مقاومتی برونگرا و درونگرا با وزنه روی دستگاه پرس پا با شدت 80 درصد یک تکرار بیشینه بود. حداکثر انقباض اختیاری عضلۀ چهارسر ران و فعالیت الکترومیوگرافی عضلۀ پهن داخلی مایل و پهن خارجی، قبل و بعد از تمرینات مقاومتی برونگرا و درونگرا اندازه‌گیری شد. حداکثر انقباض اختیاری عضلۀ چهارسر ران و فعالیت الکترومیوگرافی عضلۀ پهن داخلی مایل و پهن خارجی بعد از تمرین به‌طور معناداری افزایش یافت (05/0P<). این میزان افزایش به نوع تمرین نیز وابسته بود (05/0P<). تمرین برونگرا، در مقایسه با تمرین برونگرا، افزایش بیشتری در حداکثر انقباض اختیاری و فعالیت الکترومیوگرافی عضلۀ پهن داخلی مایل به همراه داشت (05/0P<). بهبودفعالیت عضلۀ پهن داخلی مایل در مقایسه با عضلۀ پهن خارجی نقشی مهم در حفظ ثبات کشککی رانی ایفا می‌کند و همواره راهکاری مؤثر برای جلوگیری از انحراف خارجی کشکک در نظر گرفته می‌شود؛ بنابراین پیشنهاد می‌شود تمرینات برونگرا در برنامه‌های بازتوانی یا پیشگیری از انحراف خارجی کشکک گنجانده شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله English

Assessing Electromyographic Activity Ratio of the Vastus Medialis Oblique to Vastus Laterlis Muscle after Resistance Eccentric and Cconcentric Training

نویسندگان English

  • Talieh Bagheri 1
  • Bahram Abedi 2
  • Nosratollah Hedayatpour 3
1 Department of Exercise Physiology, Mahallat Branch, Islamic Azad University, Mahallat, I.R. Iran
2 Department of Exercise Physiology, Mahallat Branch, Islamic Azad University, Mahallat, I.R. Iran
3 Department of Sport Sciences, University of Bojnord, Bojnord, Iran.
چکیده English

The  aim of this study was to assess the effect of  resistance eccentric and concentric training on electromyographic (EMG) activity ratio  of the  vastus medilais oblique (VMO) to the vastus lateralis muscle (VL). 26 healthy men participated in this study. Training  protocole contained 36 sessions of resistance eccenentric and concentric training at the level of  80 % of one repetation maximum (1RM) on leg press machine. Maximal voluntary contraction (MVC) and EMG activity of the VMO and VL muscle recorded before and after resistance eccentric and concentric training. Maxmimal voluntary contraction of quadriceps and EMG activitiy of the VMO and VL muscle significantly increased after training (P <0.05) and  depended on the training type (P <0.05). Eccentric training resulted in a greater increase in maximal voluntary contraction and EMG activity of  the VMO muscle as compared to concentric training (P <0.05).  The increased EMG activity of the VMO to VL muscle play an important role in patella stabilization, and has commonly been  used  as an effective way to prevent from  lateral patella tilt. Thus, it  is recommended that eccentric training be included in rehabilation program for lateral patella tilt.
 

کلیدواژه‌ها English

  • : Eccentric
  • Concentric
  • Qudericeps muscle
  • Electromyography
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Hedayatpour N, Falla D, Arendt-Nielsen L, Vila-Chã C, Farina D. Motor unit conduction velocity during sustained contraction after eccentric exercise. Med Sci Sports Exerc. 2009; 41(10):1927-33.

مطالعات طب ورزشی
دوره 14، شماره 31 - شماره پیاپی 31
اردیبهشت 1401
صفحه 99-120

  • تاریخ دریافت 25 آبان 1400
  • تاریخ بازنگری 01 خرداد 1401
  • تاریخ پذیرش 24 فروردین 1401

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