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The Maximum Flywheel Load: A Novel Index to Monitor Loading Intensity of Flywheel Devices

1
Departamento de Motricidad Humana y Rendimiento Deportivo, University of Seville, 41013 Seville, Spain
2
Physical Performance and Sports Research Center, Universidad Pablo de Olavide, 41013 Seville, Spain
3
Department of Physical Education and Sport, University of Seville, 41013 Seville, Spain
4
SmartCoach Europe AB, 118 20 Stockholm, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: Benedicte Vanwanseele
Sensors 2021, 21(23), 8124; https://doi.org/10.3390/s21238124
Received: 27 October 2021 / Revised: 26 November 2021 / Accepted: 2 December 2021 / Published: 4 December 2021
Background: The main aim of this study was (1) to find an index to monitor the loading intensity of flywheel resistance training, and (2) to study the differences in the relative intensity workload spectrum between the FW-load and ISO-load. Methods: twenty-one males participated in the study. Subjects executed an incremental loading test in the squat exercise using a Smith machine (ISO-load) or a flywheel device (FW-load). We studied different association models between speed, power, acceleration, and force, and each moment of inertia was used to find an index for FW-load. In addition, we tested the differences between relative workloads among load conditions using a two-way repeated-measures test. Results: the highest r2 was observed using a logarithmic fitting model between the mean angular acceleration and moment of inertia. The intersection with the x-axis resulted in an index (maximum flywheel load, MFL) that represents a theoretical individual maximal load that can be used. The ISO-load showed greater speed, acceleration, and power outcomes at any relative workload (%MFL vs. % maximum repetition). However, from 45% of the relative workload, FW-load showed higher vertical forces. Conclusions: MFL can be easily computed using a logarithmic model between the mean angular acceleration and moment of inertia to characterize the maximum theoretical loading intensity in the flywheel squat. View Full-Text
Keywords: programming; strength; training; eccentric overload; force; speed; force-velocity profile programming; strength; training; eccentric overload; force; speed; force-velocity profile
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MDPI and ACS Style

Muñoz-López, A.; Floría, P.; Sañudo, B.; Pecci, J.; Carmona Pérez, J.; Pozzo, M. The Maximum Flywheel Load: A Novel Index to Monitor Loading Intensity of Flywheel Devices. Sensors 2021, 21, 8124. https://doi.org/10.3390/s21238124

AMA Style

Muñoz-López A, Floría P, Sañudo B, Pecci J, Carmona Pérez J, Pozzo M. The Maximum Flywheel Load: A Novel Index to Monitor Loading Intensity of Flywheel Devices. Sensors. 2021; 21(23):8124. https://doi.org/10.3390/s21238124

Chicago/Turabian Style

Muñoz-López, Alejandro, Pablo Floría, Borja Sañudo, Javier Pecci, Jorge Carmona Pérez, and Marco Pozzo. 2021. "The Maximum Flywheel Load: A Novel Index to Monitor Loading Intensity of Flywheel Devices" Sensors 21, no. 23: 8124. https://doi.org/10.3390/s21238124

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