Effect of different resistance training methods on the synergy pattern of selected lower limb muscles during squatting.

Document Type : Research Paper

Authors

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2 Assistant professor of Sports Biomechanics, Department of Sports Sciences, University of Mazandaran, Babolsar, Iran

3 1. PhD student in sports physiology, Department of Sports Sciences, University of Mazandaran, Babolsar, Iran.

10.22080/jaep.2025.28350.2215

Abstract

Background and Objective: A set of functional movements is important for engaging the body in sports movements and preventing injuries. As a functional movement in terms of performance and injury prevention, squatting is a very important activity and requires special muscle coordination. Synergy and coordination of squatting movement can be affected by various factors such as the type of resistance training and changing the rest and exercise time during the performance. Therefore, the aim of this study was to investigate the effect of 4 different resistance training methods on muscle synergy during squatting.
Study Methods: 12 young male athletes performed four resistance training protocols (traditional, rest-pause, drop set and cluster methods) during squatting. The activity of the vastus-medialis, vastus-lateralis, rectus-femoris, and biceps-femoris and semitendinosus muscles during squatting was recorded in four different protocols with 75% of 1RM by electromyography. The electromyographic profile was analyzed using a non-negative factorization matrix (NNFM) method that decomposes muscle signals into synergy content.
Findings: The results showed that the number of three synergies can control muscle activity during squatting in four different resistance training protocols of squatting. In all three synergies, no difference was observed between the relative weights of muscles in different protocols, and changing the resistance training protocol maintained the number of synergies.
Conclusion: The lack of change in synergy between different resistance training protocols is a strategy of the central nervous system to preserve the overall structure of synergies in order to maintain optimal exercise performance under different training conditions.

Keywords

Journal of Applied Exercise Physiology
Volume 20, Issue 39
April 2024
Pages 4-5

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History

  • Receive Date: 05 January 2025
  • Revise Date: 17 January 2025
  • Accept Date: 24 January 2025

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