نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری فیزیولوژی ورزشی، دانشکده علوم ورزشی، دانشگاه مازندران، بابلسر، ایران.
2 استاد فیزیولوژی ورزشی، دانشکده علوم ورزشی، دانشگاه مازندران، بابلسر، ایران.
3 استادیار بیومکانیک ورزشی، دانشکده علوم ورزشی، دانشگاه مازندران، بابلسر، ایران.
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Objectives: A set of functional movements is important for engaging the human body in performing sports activities and preventing injuries. The squat is considered a highly important functional movement in both athletic performance and injury prevention, and it also requires specific muscular coordination. The synergy and coordination of the squat movement can be influenced by various factors such as the type of resistance training and changes in rest intervals and exercise execution. Therefore, the purpose of the present study was to investigate the effect of four different resistance training methods on muscle synergies during squat performance.
Methods: Twelve young male athletes performed four resistance squat protocols (traditional, rest-pause, drop set, and cluster). The activity of the vastus medialis, vastus lateralis, rectus femoris, biceps femoris, and semitendinosus muscles during squat performance with 75% of one-repetition maximum was recorded using an electromyography device. The electromyographic profiles were evaluated using the non-negative matrix factorization (NMF) method, which decomposes muscle signals into synergy components.
Results: The findings indicated that three synergies could account for muscle activity during squats across the four resistance training protocols. No differences were observed in the relative weightings of the muscles within the synergies among the different protocols. Changing the resistance training protocol did not alter the number of synergies or the relative contributions of the muscles within them.
Conclusion: It appears that the lack of change in synergies across different resistance training protocols may be due to a strategy of the central nervous system to preserve the overall structure of the synergies, which likely helps maintain optimal performance of motor tasks under various training conditions.
کلیدواژه‌ها [English]
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