مقایسه اثر خستگی عضلانی حاصل از انقباضات عضلانی زیربیشینه و بیشینه بر تغییرات همکوشی عضلانی و کنترل قامت: با توجه به تکنیک درون‌یابی تکانه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه شهید بهشتی، دانشکده تربیت بدنی و علوم ورزشی، تهران، ایران

2 استاد، گروه رفتارحرکتی، دانشکده تربیت بدنی، دانشگاه شهیدبهشتی، تهران، ایران

3 استادیار،گروه علوم رفتاری و شناختی، دانشکده علوم ورزش و تندرستی، دانشگاه شهید بهشتی، تهران، ایران

4 دانشگاه گراتس، دانشکده علوم حرکتی، ورزشی و سلامت، گراتس، اتریش

چکیده

هدف: پژوهش حاضر با هدف مقای سه اثرات خستگی عضالنی با شدتهای مختلف بیشینه و زیربیش ینه بر تغییرات همکوشی های عضالنی و کنترل قامت انجام شد. روشها: ابتدا حداکثر نیروی بیشی نه آزمودنی، میزان حداکثر تحری ک الکتریکی عضله دو قلو داخلی و موج M اندازهگیری شد. سپس12 آزمودنی دو پروتکل خستگی عضالن ی زیربیشینه و بیشینه را به طور تصادفی طی دو جلسه انجام دادند. قبل و بعد از انجام پروتکلها میزان خستگی مرکزی، خستگی محیطی، میزان تغییرات مرکز فشار و فعالیت الکتریکی عضالت اندازهگیری شدند. روش آماری آنوا با اندازهگیری تکراری و تی وابسته برای تحلیل دادهها استفاده شد. نتایج: تکانه استراحت بعد از انقباضات بیشینه نسبت به انقباضات زیربیشینه به طور معنادار کاهش یافت. همچنین خستگی زیربیشینه موجب کاهش معنادار در فعالسازی ارادی و حداکثر نیروی بیشینه نسبت به خستگی عضالنی بیشینه شد. انقباضات زیربیشینه موجب کاهش قابل توجه واریانس عضالت و همکوشیهای عضالن ی و از سوی دیگر موجب تغییرات معنادار بیشتر مرکز فشار نسبت به انقباضات بیش ینه شد )05/0>p.) نتیجهگیری: نتایج پژوهش حاضر راه را برای انجام مطالعات دیگر هموار میکند تا برنامههای تمرین ی را برای افرادی که در حفظ تعادل و سازماندهی همکوشی عضالنی مشکل دارند با نظارت بر تمرینات عضالن ی با شدت زیرب یشینه نسبت به بیشینه طراحی کنند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Comparison of the effect of muscle fatigue resulting from submaximal and maximal muscle contractions on changes in muscle synergy and height control: According to impulse interpolation technique

نویسندگان [English]

  • zeinab Hatami Bahmanbegloo 1
  • alireza farsi 2
  • hamidollah hassanlouei 3
  • markus tilp 4
1 Faculty of Sport Sciences & Health, University of Shahid Beheshti, Tehran, Iran
2 Professor, Department of motor behavior, Faculty of Sport Sciences & Health, University of Shahid Beheshti, Tehran, Iran
3 Assistant Professor, Department of Behavioral and Cognitive Sciences, Faculty of Sports and Health Sciences, Shahid Beheshti University, Tehran, Iran
4 Full Professor at the Institute of Movement Science, Sport and Health, University of Graz.
چکیده [English]

Purpose: The aim of this study was to compare the effects of maximal and submaximal fatiguing contractions on voluntary postural stability and muscle synergies. Methods: Following isometric maximum voluntary contraction (IMVC) tests, 12 volunteers randomly performed submaximal and maximal fatiguing contractions of the plantar flexors. Before and after the fatiguing protocols, the central fatigue, peripheral fatigue, the centre of pressure and activities of 12 muscles was recorded. Repeated measure ANOVA dependent T was used for data analysis. Results: Rest twitch size was smaller after maximal than submaximal fatiguing contractions. Voluntary activation and IMVC decreased significantly more after submaximal than maximal fatiguing contractions. M wave was not changed significantly after two protocols of fatiguing contractions. Furthermore, in comparison with the maximal fatiguing contractions, the submaximal fatiguing contractions lead significant decrease in variance of muscles activity and muscle synergies. The ellipse of COP area also increases significantly after submaximal than maximal fatiguing contractions (p < 0.05). Conclusion: The outcome of this study suggests that training programs for patients with balance and muscle synergies issues should be based on training with submaximal rather than maximal load.

کلیدواژه‌ها [English]

  • central fatigue
  • Peripheral fatigue
  • maximal contractions
  • submaximal contractions
  • postural stability
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neuromuscular fatigue after constant-load
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to isolated shoulder fatigue during simulated
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Electromyography and Kinesiology. 2016;29:34-
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neurophysiology. 2017;117(3):1070-83.
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motoneurons. Journal of neurophysiology.
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