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Article

Intermuscular Coordination in the Power Clean Exercise: Comparison between Olympic Weightlifters and Untrained Individuals—A Preliminary Study

1
Neuromuscular Research Lab, Faculty of Human Kinetics, Lisbon University, 1499-002 Cruz Quebrada-Dafundo, Portugal
2
CIPER, Faculty of Human Kinetics, Lisbon University, 1499-002 Cruz Quebrada-Dafundo, Portugal
3
Biomechanics and Functional Morphology Laboratory, Faculty of Human Kinetics, Lisbon University, 1499-002 Cruz Quebrada-Dafundo, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Taco J. Blokhuis
Sensors 2021, 21(5), 1904; https://doi.org/10.3390/s21051904
Received: 9 January 2021 / Revised: 22 February 2021 / Accepted: 1 March 2021 / Published: 9 March 2021
(This article belongs to the Special Issue Sensors and Technologies in Skeletal Muscle Disorder)
Muscle coordination in human movement has been assessed through muscle synergy analysis. In sports science, this procedure has been mainly applied to the comparison between highly trained and unexperienced participants. However, the lack of knowledge regarding strength training exercises led us to study the differences in neural strategies to perform the power clean between weightlifters and untrained individuals. Synergies were extracted from electromyograms of 16 muscles of ten unexperienced participants and seven weightlifters. To evaluate differences, we determined the pairwise correlations for the synergy components and electromyographic profiles. While the shape of activation patterns presented strong correlations across participants of each group, the weightings of each muscle were more variable. The three extracted synergies were shifted in time with the unexperienced group anticipating synergy #1 (−2.46 ± 18.7%; p < 0.001) and #2 (−4.60 ± 5.71%; p < 0.001) and delaying synergy #3 (1.86 ± 17.39%; p = 0.01). Moreover, muscle vectors presented more inter-group variability, changing the composition of synergy #1 and #3. These results may indicate an adaptation in intermuscular coordination with training, and athletes in an initial phase of training should attempt to delay the hip extension (synergy #1), as well as the upper-limb flexion (synergy #2). View Full-Text
Keywords: strength training; neural adaptations; muscle coordination; muscle synergies; electromyography strength training; neural adaptations; muscle coordination; muscle synergies; electromyography
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MDPI and ACS Style

Santos, P.D.G.; Vaz, J.R.; Correia, P.F.; Valamatos, M.J.; Veloso, A.P.; Pezarat-Correia, P. Intermuscular Coordination in the Power Clean Exercise: Comparison between Olympic Weightlifters and Untrained Individuals—A Preliminary Study. Sensors 2021, 21, 1904. https://doi.org/10.3390/s21051904

AMA Style

Santos PDG, Vaz JR, Correia PF, Valamatos MJ, Veloso AP, Pezarat-Correia P. Intermuscular Coordination in the Power Clean Exercise: Comparison between Olympic Weightlifters and Untrained Individuals—A Preliminary Study. Sensors. 2021; 21(5):1904. https://doi.org/10.3390/s21051904

Chicago/Turabian Style

Santos, Paulo D.G.; Vaz, João R.; Correia, Paulo F.; Valamatos, Maria J.; Veloso, António P.; Pezarat-Correia, Pedro. 2021. "Intermuscular Coordination in the Power Clean Exercise: Comparison between Olympic Weightlifters and Untrained Individuals—A Preliminary Study" Sensors 21, no. 5: 1904. https://doi.org/10.3390/s21051904

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