Muscle activation sequence in flywheel squats

Spudić, Darjan (avtor), Smajla, Darjan (avtor), Burnard, Michael David (avtor), Šarabon, Nejc (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: isoinertial training, EMG, eccentric exercise, overload, muscle coordination
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FŠ - Fakulteta za šport
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 12 str.
• Številčenje: Vol. 18, iss. 6, art. 3168
• PID: 20.500.12556/RUL-135218
• UDK: 796/799
• ISSN pri članku: 1660-4601
• DOI: 10.3390/ijerph18063168
• COBISS.SI-ID: 56468227
• Datum objave v RUL: 01.03.2022

Gradivo je del revije

• Naslov: International journal of environmental research and public health
• Skrajšan naslov: Int. j. environ. res. public health
• Založnik: MDPI
• ISSN: 1660-4601
• COBISS.SI-ID: 1818965

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 19.03.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: isoinercijska vadba, EMG, ekscentrična vadba, preobremenitev, mišična koordinacija

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P5-0147
• Naslov: Kineziologija monostrukturnih, polistrukturnih in konvencionalnih športov

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: L5-1845
• Naslov: 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