Physical Performance & Sports Research, Universidad Pablo de Olavide , Seville, Spain.
Departamento de Motricidad Humana y Rendimiento Deportivo, University of Seville , Seville, Spain.
J Sports Sci. 2020 Jul;38(14):1624-1628. doi: 10.1080/02640414.2020.1754111. Epub 2020 Apr 17.
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.
本研究的目的是比较使用水平圆柱形轴或垂直锥形轴在旋转惯性装置中提供阻力的力曲线，并报告在半蹲运动中经验丰富的运动员的运动学和运动学变量的演变。22 名健康活跃的男性参与了在锥形惯性装置 (CP) 和圆柱形惯性装置 (YY) 上进行的半蹲递增测试的时间、峰值速度、峰值力、达到峰值力的时间、平均力、冲量和运动范围的评估。分析表明，在 CON-ECC 阶段，YY 产生的峰值力、平均力、冲量、时间显著高于 CP，而峰值速度较低。我们从未获得过偏心过载的峰值力或平均力。与 YY 相比，CP 提供的阻力较小，无法加速-减速运动，我们需要检查是否产生了偏心过载，并且冲量是唯一能够区分惯性和装置的动力学变量。
