Chen Zhili, Liao Kaifang, Bishop Chris, Bian Chao, Li Yongming
School of Athletic Performance, Shanghai University of Sport, Shanghai, China.
School of Sports Health, Guangdong Vocational Institute of Sport, Guangzhou, China.
J Hum Kinet. 2024 Dec 6;95:161-171. doi: 10.5114/jhk/189365. eCollection 2025 Jan.
This study aimed to assess the validity of three commercial devices in recording mean velocity (MV) and peak velocity (PV) during a unilateral resistance exercise. Eighteen strength-trained and healthy males performed repetitions of Bulgarian split squats at loads ranging from 40% to 90% of their one-repetition maximum. MV and PV were simultaneously recorded by GymAware, PUSH, My Lift and compared to Vicon for all repetitions. Concurrent validity was assessed through a linear mixed model, as well as mean difference (MD), mean absolute error (MAE) and Hedge's g effect sizes. GymAware was found to be valid in MV (MD = -0.02 to -0.01 m/s, MAE = 0.02 to 0.03 m/s, g = -0.08 to -0.19) and PV (MD = 0.01 to 0.05 m/s, MAE = 0.05 to 0.07 m/s, g = -0.06 to -0.22) recordings. Significant differences were identified between GymAware, PUSH, My Lift and Vicon for both MV (p < 0.01) and PV (p < 0.01) assessments. Moreover, when comparing MV and PV recorded by PUSH and My Lift to Vicon, larger MD and MAE, and trivial to moderate effects were also evident. Therefore, our findings suggest that GymAware could be an alternative for recording MV and PV during unilateral resistance exercises.
本研究旨在评估三种商用设备在单侧抗阻训练过程中记录平均速度（MV）和峰值速度（PV）的有效性。18名经过力量训练的健康男性以其一次重复最大值的40%至90%的负荷进行保加利亚分腿蹲重复动作。在所有重复动作中，通过GymAware、PUSH、My Lift同步记录MV和PV，并与Vicon记录的数据进行比较。通过线性混合模型以及平均差异（MD）、平均绝对误差（MAE）和赫奇斯g效应量来评估同时效度。结果发现，GymAware在记录MV（MD = -0.02至-0.01米/秒，MAE = 0.02至0.03米/秒，g = -0.08至-0.19）和PV（MD = 0.01至0.05米/秒，MAE = 0.05至0.07米/秒，g = -0.06至-0.22）方面是有效的。在MV（p < 0.01）和PV（p < 0.01）评估中，GymAware、PUSH、My Lift与Vicon之间均存在显著差异。此外，将PUSH和My Lift记录的MV和PV与Vicon记录的数据进行比较时，也明显存在更大的MD和MAE，以及微小至中等的效应。因此，我们的研究结果表明，GymAware可作为单侧抗阻训练过程中记录MV和PV的一种替代设备。
