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The Flywheel Device Shaft Shape Determines Force and Velocity Profiles in The Half Squat Exercise

Flywheel resistance training devices can be classified by their shaft shape. The objective of this study was to analyze whether using two flywheel resistance training devices shaft shapes can influence force and velocity production, regardless of the inertia used. Thirty-nine (n = 39) healthy active...

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Autores principales: Muñoz-López, Alejandro, Galiano, Carlos, Núñez, Francisco Javier, Floría, Pablo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Sciendo 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8884883/
https://www.ncbi.nlm.nih.gov/pubmed/35291636
http://dx.doi.org/10.2478/hukin-2022-0002
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author Muñoz-López, Alejandro
Galiano, Carlos
Núñez, Francisco Javier
Floría, Pablo
author_facet Muñoz-López, Alejandro
Galiano, Carlos
Núñez, Francisco Javier
Floría, Pablo
author_sort Muñoz-López, Alejandro
collection PubMed
description Flywheel resistance training devices can be classified by their shaft shape. The objective of this study was to analyze whether using two flywheel resistance training devices shaft shapes can influence force and velocity production, regardless of the inertia used. Thirty-nine (n = 39) healthy active men participated in this study. They were randomized to perform 3 sets of 7 repetitions at maximal concentric voluntary execution, followed by a break in the last third of the eccentric phase in the half squat exercise. A progressive rotational inertial setting of 0.11, 0.22, and 0.33 kg·m(2) was used. Force- and velocity-time profiles were captured using two force plates and a synchronized linear encoder. Statistical parametric mapping was used to compare biomechanical output between the flywheel devices. The level of significance was set at p < 0.05. Force application was significantly higher in the horizontal cylinder-shaped device for the three moments of inertia used in the eccentric phase (p < 0.001). In the concentric phase, force application was significantly higher in the horizontal cylinder-shaped device in 0.11 (p < 0.001) and 0.22 kg·m(2) (p < 0.001). The resultant speed was higher in the vertical cone-shaped device in the concentric phase and the eccentric phase for the three moments of inertia (p < 0.001). In conclusion, the flywheel shaft type determines the mechanical output of the half squat exercise, regardless of the moment of inertia used. While a horizontal cylinder-shaped device is more suitable to achieve higher forces, especially in the eccentric phase, a vertical cone-shaped device can be used to achieve higher speeds during the execution of the exercise.
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spelling pubmed-88848832022-03-14 The Flywheel Device Shaft Shape Determines Force and Velocity Profiles in The Half Squat Exercise Muñoz-López, Alejandro Galiano, Carlos Núñez, Francisco Javier Floría, Pablo J Hum Kinet Section I - Kinesiology Flywheel resistance training devices can be classified by their shaft shape. The objective of this study was to analyze whether using two flywheel resistance training devices shaft shapes can influence force and velocity production, regardless of the inertia used. Thirty-nine (n = 39) healthy active men participated in this study. They were randomized to perform 3 sets of 7 repetitions at maximal concentric voluntary execution, followed by a break in the last third of the eccentric phase in the half squat exercise. A progressive rotational inertial setting of 0.11, 0.22, and 0.33 kg·m(2) was used. Force- and velocity-time profiles were captured using two force plates and a synchronized linear encoder. Statistical parametric mapping was used to compare biomechanical output between the flywheel devices. The level of significance was set at p < 0.05. Force application was significantly higher in the horizontal cylinder-shaped device for the three moments of inertia used in the eccentric phase (p < 0.001). In the concentric phase, force application was significantly higher in the horizontal cylinder-shaped device in 0.11 (p < 0.001) and 0.22 kg·m(2) (p < 0.001). The resultant speed was higher in the vertical cone-shaped device in the concentric phase and the eccentric phase for the three moments of inertia (p < 0.001). In conclusion, the flywheel shaft type determines the mechanical output of the half squat exercise, regardless of the moment of inertia used. While a horizontal cylinder-shaped device is more suitable to achieve higher forces, especially in the eccentric phase, a vertical cone-shaped device can be used to achieve higher speeds during the execution of the exercise. Sciendo 2022-02-10 /pmc/articles/PMC8884883/ /pubmed/35291636 http://dx.doi.org/10.2478/hukin-2022-0002 Text en © 2022 Alejandro Muñoz-López, Carlos Galiano, Francisco Javier Núñez, Pablo Floría, published by Sciendo https://creativecommons.org/licenses/by-nc-nd/3.0/This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
spellingShingle Section I - Kinesiology
Muñoz-López, Alejandro
Galiano, Carlos
Núñez, Francisco Javier
Floría, Pablo
The Flywheel Device Shaft Shape Determines Force and Velocity Profiles in The Half Squat Exercise
title The Flywheel Device Shaft Shape Determines Force and Velocity Profiles in The Half Squat Exercise
title_full The Flywheel Device Shaft Shape Determines Force and Velocity Profiles in The Half Squat Exercise
title_fullStr The Flywheel Device Shaft Shape Determines Force and Velocity Profiles in The Half Squat Exercise
title_full_unstemmed The Flywheel Device Shaft Shape Determines Force and Velocity Profiles in The Half Squat Exercise
title_short The Flywheel Device Shaft Shape Determines Force and Velocity Profiles in The Half Squat Exercise
title_sort flywheel device shaft shape determines force and velocity profiles in the half squat exercise
topic Section I - Kinesiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8884883/
https://www.ncbi.nlm.nih.gov/pubmed/35291636
http://dx.doi.org/10.2478/hukin-2022-0002
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