تأثیر خستگی موضعی و عمومی بر متغیرهای میوالکتریکی عضلات منتخب اندام تحتانی در مردان جوان سالم فعال در مهارت پرش-فرود تک پا

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری بیومکانیک ورزشی، دانشکده تربیت بدنی و علوم ورزشی دانشگاه آزاد تهران مرکزی، تهران، ایران

2 استادتمام بیومکانیک ورزشی، دانشکده تربیت بدنی و علوم ورزشی دانشگاه خوارزمی، تهران، ایران استادتمام بیومکانیک ورزشی، پژوهشکده علوم حرکتی، دانشگاه خوارزمی، تهران، ایران

3 استادیار بیومکانیک ورزشی، دانشکده علوم ورزشی دانشگاه بیرجند، بیرجند، ایران

10.22037/jrm.2020.112745.2247

چکیده

مقدمه و اهداف
با توجه به اینکه خستگی به عنوان پدیده­ای شایع در طی فعالیت ‏های ورزشی و تمرینی شناخته می­شود و فرض بر این است که این پدیده در اغلب موارد باعث اختلال در عملکرد حرکتی افراد و ایجاد آسیب­های مختلف می‏شود، هدف پژوهش حاضر تعیین اثر خستگی موضعی و عمومی بر متغیرهای میوالکتریکی عضلات منتخب اندام تحتانی در مردان جوان سالم فعال در اجرای مهارت پرش-فرود تک­پا از ارتفاع بود.
مواد و روش‎ها
20 آزمودنی مرد جوان سالم فعال در دسترس در تحقیق نیمه ­تجربی حاضر شرکت کردند. برای ایجاد خستگی موضعی از تست وینگیت و برای ایجاد خستگی عمومی ناشی از فعالیت تا حد واماندگی، از آزمون بروس استفاده شد. برای ثبت فعالیت الکتریکی عضلات منتخب اندام تحتانی (سرینی میانی، پهن خارجی، درشت ­نی قدامی، نازکی­نی طویل، دوقلوی داخلی و نعلی) از دستگاه الکترومایوگرافی و برای تحلیل آماری داده­ها، از روش آنوا با اندازه­ های تکراری برای بررسی اثر دو نوع خستگی موضعی و عمومی بر متغیرهای وابسته در سطح معناداری 05/0≥P استفاده شد.
یافته ­ها
نتایج تفاوت معناداری بین اثر خستگی موضعی و عمومی بر میانگین فعالیت نرمالیزه شدۀ عضلۀ سرینی میانی (046/0=P) و میزان فرکانس میانۀ عضلۀ دوقلوی داخلی (019/0=P) را نشان داد، در حالی که بین میانگین و حداکثر فعالیت نرمالیزه ­شده و همچنین فرکانس میانۀ عضلات سرینی میانی، پهن خارجی، درشت­نی قدامی، نازکی­نی طویل و نعلی تفاوت معناداری بین دو نوع خستگی موضعی و عمومی مشاهده نشد (05/0<P).
نتیجه­ گیری
با توجه به یافته ‏های تحقیق حاضر، به نظر می‏رسد که میزان اثر نوع اعمال خستگی موضعی و عمومی بر عملکرد عضلات اندام تحتانی حین اجرای حرکت پرش-فرود تک­پا یکسان است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effects of Local and Global Fatigue on the Myoelectric Variables of Selected Lower Limb Muscles in Healthy Young Active Men in Single Jump-Landing Task

نویسندگان [English]

  • Raheleh Nasrabadi 1
  • Heydar Sadeghi 2
  • Mohammad Yousefi 3
1 PhD Candidate in Sports Biomechanics, Faculty of Sports Sciences and Physical Education, Central branch of Azad University, Tehran, Iran
2 Professor, Department of Sports Biomechanics, Faculty of Sports Sciences and Physical Education, Kharazmi University, Tehran, Iran Professor, Department of sports biomechanics, Institute of Motion Science, Kharazmi University, Tehran, Iran
3 Assistant Professor, Department of Sport Biomechanics, Faculty of Sports Sciences, University of Birjand, Birjand, Iran
چکیده [English]

Background and Aims: Since fatigue is known as a common phenomenon during exercise and it is hypothesized that it often impairs motor function and causes various injuries, the purpose of the present study was to determine the effects of local and global fatigue on the myoelectric variables of selected lower limb muscles in healthy young men active in single leg jump-landing task.
Materials and Methods: A total of 20 able-bodied healthy young males participated in the current quasi-experimental study. Wingate and Bruce tests were used to create local and global fatigue, respectively. Electrical activities of selected lower limb muscles (Gluteus Medius, Vastus lateralis, Tibialis Anterior, Peroneus Longus, Gastrocnemius and soleus muscles) were recorded using electromyography device, and Analysis of Variance (ANOVA) with repeated measures tests were used for data analysis. The significance level was set at P≥0.05.
Results: The results showed a significant difference between the effects of local and global fatigue on the mean normalized middle serine muscle activity (P=0.046) and medial Gastrocnemius muscle midline frequency (P=0.019). However, there was no significant difference between mean and maximum normalized activity and frequency of middle serine, Vastus lateralis, anterior tibia, fibular longus, and soleus (P<0.05).
Conclusion: According to the findings of the present study, it seems that the effects of the types of local and global fatigue on lower limb muscle performance during single jump-landing exercise are similar.

کلیدواژه‌ها [English]

  • Local fatigue
  • Global fatigue
  • Single jump-landing
  • Electromyography

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فصلنامه علمی - پژوهشی طب توانبخشی

دوره 9، شماره 1
بهار 1399
صفحه 1-10

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سابقه مقاله

  • تاریخ دریافت: 27 آبان 1398
  • تاریخ بازنگری: 15 دی 1398
  • تاریخ پذیرش: 17 دی 1398

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