Influence of load and phase of contraction on lateral symmetries in flywheel squats

Smajla, Darjan (author), Spudić, Darjan (author), Šarabon, Nejc (author)

Assessment of lateral symmetries (LS) of lower limbs has been widely investigated. However, there are no studies about LS during exposure to high eccentric and concentric loads during flywheel (FW) squats. A total of 422 young, physically active participants performed squats on an FW device with different equidistant loads (0.05, 0.125 and 0.2 kg·m$^2$). The mean and peak force of the left and right leg were assessed for the concentric and eccentric contaction phase. LS values were calculated for each load and phase of squat. Our results showed that the absolute mean and peak force of the concentric and eccentric phase of contraction had excellent reliability, while LS values were more reliable when eccentric force was used for their calculation. Mean and peak forces were increased with the higher FW load. In general, we found a decrease in LS values in the concentric phase of contraction with the higher load. Moreover, values of LS are similar to a wide range of other functional movements. Nevertheless, symmetrical force application during squatting on a FW device should be satisfied regardless of the FW load. Due to the large sample size, our results are valuable as a reference point when athletes are evaluated during training.

• Language: English
• Keywords: inertia, concentric, eccentric, asymmetry, squatting
• 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: 14 str.
• Numbering: Vol. 13, iss. 1, art. 111
• PID: 20.500.12556/RUL-134799
• UDC: 796/799
• ISSN on article: 2073-8994
• DOI: 10.3390/sym13010111
• COBISS.SI-ID: 46283523
• Publication date in RUL: 02.02.2022

Record is a part of a journal

• Title: Symmetry
• Shortened title: Symmetry
• Publisher: Molecular Diversity Preservation International
• ISSN: 2073-8994
• COBISS.SI-ID: 517592345

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: 11.01.2021

Secondary language

• Language: Slovenian
• Keywords: inercija, koncentrično, asimetrija, počep

Projects

• 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

• Funder: ARRS - Slovenian Research Agency
• Project number: P5-0147
• Name: Kineziologija monostrukturnih, polistrukturnih in konvencionalnih športov