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Muscle activation sequence in flywheel squats
ID
Spudić, Darjan
(
Author
),
ID
Smajla, Darjan
(
Author
),
ID
Burnard, Michael David
(
Author
),
ID
Šarabon, Nejc
(
Author
)
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MD5: 1999F3D913F64E18CA65CB74355AF6DB
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https://www.mdpi.com/1660-4601/18/6/3168
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Abstract
Background: Muscle coordination is important for rational and effective planning of therapeutic and exercise interventions using equipment that mimics functional movements. Our study was the first to assess muscle coordination during flywheel (FW) squats. Methods: Time-ofpeak electromyographic activation order was assessed separately for 8, 4, and 3 leg muscles under four FW loads. A sequential rank agreement permutations tests (SRA) were conducted to assess activation order and Kendall’s tau was used to assess the concordance of activation order across subjects, loads and expected order of activation. Results: SRA revealed a latent muscle activation order at loads 0.05, 0.075, and 0.1, but not at 0.025 kg·m$^2$. Kendall’s tau showed moderate-to-strong concordance between the expected (proximal-to-distal) and the observed muscle activation order only at a load 0.025 kg·m$^2$, regardless of the number of muscles analyzed. Muscle activation order was highly concordant between loads 0.05, 0.075, and 0.1 kg·m$^2$. Conclusions: The results show a specific role of each muscle during the FW squat that is load-dependent. While the lowest load follows the proximal-to-distal principle of muscle activation, higher loads lead to a reorganization of the underlying muscle coordination mechanisms. They require a specific and stable muscle coordination pattern that is not proximal-to-distal.
Language:
English
Keywords:
isoinertial training
,
EMG
,
eccentric exercise
,
overload
,
muscle coordination
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FŠ - Faculty of Sport
Publication status:
Published
Publication version:
Version of Record
Year:
2021
Number of pages:
12 str.
Numbering:
Vol. 18, iss. 6, art. 3168
PID:
20.500.12556/RUL-135218
UDC:
796/799
ISSN on article:
1660-4601
DOI:
10.3390/ijerph18063168
COBISS.SI-ID:
56468227
Publication date in RUL:
01.03.2022
Views:
706
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112
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Record is a part of a journal
Title:
International journal of environmental research and public health
Shortened title:
Int. j. environ. res. public health
Publisher:
MDPI
ISSN:
1660-4601
COBISS.SI-ID:
1818965
Licences
License:
CC BY 4.0, Creative Commons Attribution 4.0 International
Link:
http://creativecommons.org/licenses/by/4.0/
Description:
This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:
19.03.2021
Secondary language
Language:
Slovenian
Keywords:
isoinercijska vadba
,
EMG
,
ekscentrična vadba
,
preobremenitev
,
mišična koordinacija
Projects
Funder:
ARRS - Slovenian Research Agency
Project number:
P5-0147
Name:
Kineziologija monostrukturnih, polistrukturnih in konvencionalnih športov
Funder:
ARRS - Slovenian Research Agency
Project number:
L5-1845
Name:
Telesne asimetrije kot dejavnik tveganja za nastanek mišično-skeletnih poškodb: proučevanje mehanizmov nastanka in razvoj korektivnih ukrepov za njihovo odpravljanje s ciljem primarne in terciarne preventive
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