Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, West Yorkshire, United Kingdom.
Yorkshire Carnegie Rugby Union Club, Kirkstall Training Ground, Leeds Rugby Academy, Leeds, West Yorkshire, United Kingdom.
J Strength Cond Res. 2019 May;33(5):1180-1184. doi: 10.1519/JSC.0000000000003132.
Weakley, J, Fernández-Valdés, B, Thomas, L, Ramirez-Lopez, C, and Jones, B. Criterion validity of force and power outputs for a commonly used flywheel resistance training device and bluetooth app. J Strength Cond Res 33(5): 1180-1184, 2019-Flywheels are a resistance training device that can increase lean body mass, strength, and power. However, because of their unique design and the inertia from the concentric portion directly relating to the force that is applied during the eccentric portion, monitoring the training stimulus can be difficult. Consequently, the aim of this study was to assess the validity of the kMeter app for quantifying force and power at a range of different isoinertial loads from a flywheel training device when compared against a criterion measure. Eleven subjects volunteered to take part in this study, with subjects completing between 5 and 35 repetitions of the harness squat with 0.05, 0.10, 0.15 kg·m isoinertial load. A synchronized dual force plate and tricamera optoelectronic setup was used as the criterion measure to calculate force and power output, while the kMeter app was used as the practical measure. Very large to nearly perfect relationships were observed between the 2 measures, with trivial to moderate bias reported. In addition, typical error of the estimate (TEE) was found to be <10% at all isoinertial loads. These findings suggest that the kMeter app, when used in conjunction with the kBox flywheel device, demonstrates acceptable levels of validity. However, because of the TEE, the kMeter app may not be able to accurately detect small differences and therefore be suitable for research purposes. These findings suggest that the kMeter app is an acceptable method of monitoring flywheel resistance training. Furthermore, it is advised that practitioners use mean power rather than mean force.
威克利、J、费尔南德斯-瓦尔德斯、B、托马斯、L、拉米雷斯-洛佩兹、C 和琼斯、B. 常用飞轮阻力训练设备和蓝牙应用程序的力和功率输出的效标效度。J 力量与条件研究 33(5):1180-1184,2019-飞轮是一种阻力训练设备，可以增加瘦体重、力量和功率。然而，由于其独特的设计和来自于在离心部分直接与在向心部分施加的力相关的惯性，监测训练刺激可能很困难。因此，本研究的目的是评估 kMeter 应用程序在与标准测量值相比时，在从飞轮训练设备的一系列不同等动负荷下量化力和功率的有效性。11 名受试者自愿参加本研究，受试者完成了 5 到 35 次吊带深蹲，负荷分别为 0.05、0.10、0.15kg·m 等动负荷。同步双力板和三相机光电装置被用作标准测量来计算力和功率输出，而 kMeter 应用程序被用作实际测量。在这两种测量方法之间观察到非常大到几乎完美的关系，报告了微小到中度的偏差。此外，在所有等动负荷下，发现估计的典型误差（TEE）<10%。这些发现表明，kMeter 应用程序与 kBox 飞轮设备一起使用时，具有可接受的有效性。然而，由于 TEE，kMeter 应用程序可能无法准确检测到小的差异，因此适合研究目的。这些发现表明，kMeter 应用程序是监测飞轮阻力训练的一种可接受的方法。此外，建议从业者使用平均功率而不是平均力。
