Is possible an eccentric overload in a rotary inertia device? Comparison of force profile in a cylinder-shaped and a cone-shaped axis devices.
The aims of this study were to compare the force profile of using a horizontal cylinder-shaped axis or a vertical cone-shaped axis to provide resistance in rotary inertia devices, and to report the evolution of kinetic and kinematic variables in experienced athletes during a half-squat exercise. Twenty-two healthy active men participated in the assessment of time, peak velocity, peak force, time to reach the peak force, average force, impulse, and range of movement, during a half-squat incremental test performed on conical inertial device (CP) and on cylinder inertial device (YY). The analysis showed that YY during CON-ECC phased generates substantial higher peak_force, mean_force, impulse, time, and a lower peak_velocity, than CP. We never obtained eccentric overload for peak_force or mean_force. CP offers less resistance to accelerate-decelerate the movement with respect to YY, we need checking whether eccentric overload it is being produced, and the impulse was the only kinetic variable that was able to discriminate between the inertias and devices.
['Núñez|F Javier|FJ|https://orcid.org/0000-0002-4166-3877', 'Galiano|Carlos|C|https://orcid.org/0000-0003-1540-3964', 'Muñoz-López|Alejandro|A|https://orcid.org/0000-0003-1206-8697', 'Floria|Pablo|P|https://orcid.org/0000-0002-1863-4285']
D001696:Biomechanical Phenomena D004867:Equipment Design D006801:Humans D007700:Kinetics D008297:Male D009068:Movement D055070:Resistance Training D019876:Sports Equipment D014891:Weight Lifting D055815:Young Adult
impulse Force-velocity Strength training eccentric-overload flywheel paradigm