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  Motor control strategies differ between monoarticular and biarticular quadriceps muscles during bipedal squats

Maudrich, T., Tapper, P., Clauß, M., Falz, R., Lässing, J., & Kenville, R. (2022). Motor control strategies differ between monoarticular and biarticular quadriceps muscles during bipedal squats. Scandinavian Journal of Medicine & Science in Sports, 32(11), 1569-1580. doi:10.1111/sms.14230.

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 Creators:
Maudrich, Tom1, 2, Author                 
Tapper, Pascal1, Author
Clauß, Martina1, Author
Falz, Roberto3, Author
Lässing, Johannes3, Author
Kenville, Rouven1, 2, Author                 
Affiliations:
1Department of Human Movement Neuroscience, Faculty of Sport Science, University of Leipzig, Germany, ou_persistent22              
2Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
3Department of Sport Medicine and Prevention, Faculty of Sport Science, University of Leipzig, Germany, ou_persistent22              

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Free keywords: Intermuscular coherence; Muscle covariation; Motor control; Squats; Surface EMG
 Abstract: The interplay between biarticular and monoarticular muscles of the knee and hip joints during bipedal squats (SQBP ) requires adequate central-nervous control mechanisms to enable smooth and dynamic movements. Here, we investigated motor control between M. vastus medialis (VM), M. vastus lateralis (VL), and M. rectus femoris (RF) in 12 healthy male recreational athletes during SQBP with three load levels (50%, 62.5% & 75% of 3-repetition maximum) following a standardized strength training protocol (3 sets of 10 repetitions). To quantify differences in motor control mechanisms in both time and frequency domains, we analyzed (1) muscle covariation via correlation analyses, as well as (2) common neural input via intermuscular coherence (IMC) between RF, VM, and VL. Our results revealed significantly higher gamma IMC between VM-VL compared to RF-VL and RF-VM for both legs. Correlation analyses demonstrated significantly higher correlation coefficients during ascent periods compared to descent periods across all analyzed muscle pairs. However, no load-dependent modulation of motor control could be observed. Our study provides novel evidence that motor control during SQBP is characterized by differences in common input between biarticular and monoarticular muscles. Additionally, muscle activation patterns show higher similarity during ascent compared to descent periods. Future research should aim to validate and extend our observations as insights into the underlying control mechanisms offer the possibility for practical implications to optimize training concepts in elite sports and rehabilitation.

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Language(s): eng - English
 Dates: 2022-08-192022-07-062022-09-052022-09-102022-11
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1111/sms.14230
Other: epub 2022
PMID: 36086908
 Degree: -

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Title: Scandinavian Journal of Medicine & Science in Sports
Source Genre: Journal
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Publ. Info: Oxford : Wiley-Blackwell
Pages: - Volume / Issue: 32 (11) Sequence Number: - Start / End Page: 1569 - 1580 Identifier: ISSN: 1600-0838
CoNE: https://pure.mpg.de/cone/journals/resource/1600-0838