Balsalobre-Fernández Carlos, Kuzdub Matt, Poveda-Ortiz Pedro, Campo-Vecino Juan Del
1Department of Physical Education, Sport and Human Movement, Autonomous University of Madrid, Spain; and 2PUSH, Toronto, Ontario, Canada.
J Strength Cond Res. 2016 Jul;30(7):1968-74. doi: 10.1519/JSC.0000000000001284.
Balsalobre-Fernández, C, Kuzdub, M, Poveda-Ortiz, P, and Campo-Vecino, Jd. Validity and reliability of the PUSH wearable device to measure movement velocity during the back squat exercise. J Strength Cond Res 30(7): 1968-1974, 2016-The purpose of this study was to analyze the validity and reliability of a wearable device to measure movement velocity during the back squat exercise. To do this, 10 recreationally active healthy men (age = 23.4 ± 5.2 years; back squat 1 repetition maximum [1RM] = 83 ± 8.2 kg) performed 3 repetitions of the back squat exercise with 5 different loads ranging from 25 to 85% 1RM on a Smith Machine. Movement velocity for each of the total 150 repetitions was simultaneously recorded using the T-Force linear transducer (LT) and the PUSH wearable band. Results showed a high correlation between the LT and the wearable device mean (r = 0.85; standard error of estimate [SEE] = 0.08 m·s) and peak velocity (r = 0.91, SEE = 0.1 m·s). Moreover, there was a very high agreement between these 2 devices for the measurement of mean (intraclass correlation coefficient [ICC] = 0.907) and peak velocity (ICC = 0.944), although a systematic bias between devices was observed (PUSH peak velocity being -0.07 ± 0.1 m·s lower, p ≤ 0.05). When measuring the 3 repetitions with each load, both devices displayed almost equal reliability (Test-retest reliability: LT [r = 0.98], PUSH [r = 0.956]; ICC: LT [ICC = 0.989], PUSH [ICC = 0.981]; coefficient of variation [CV]: LT [CV = 4.2%], PUSH [CV = 5.0%]). Finally, individual load-velocity relationships measured with both the LT (R = 0.96) and the PUSH wearable device (R = 0.94) showed similar, very high coefficients of determination. In conclusion, these results support the use of an affordable wearable device to track velocity during back squat training. Wearable devices, such as the one in this study, could have valuable practical applications for strength and conditioning coaches.
巴尔萨洛布雷 - 费尔南德斯、C、库兹杜布、M、波韦达 - 奥尔蒂斯、P和坎波 - 韦西诺、Jd。PUSH可穿戴设备在深蹲运动中测量运动速度的有效性和可靠性。《力量与体能研究杂志》30(7): 1968 - 1974，2016年——本研究的目的是分析一种可穿戴设备在深蹲运动中测量运动速度的有效性和可靠性。为此，10名有休闲运动习惯的健康男性（年龄 = 23.4 ± 5.2岁；深蹲1次最大重复量[1RM] = 83 ± 8.2千克）在史密斯机上使用5种不同负荷（范围为1RM的25%至85%）进行3次深蹲运动重复。使用T - Force线性传感器（LT）和PUSH可穿戴手环同时记录总共150次重复中每次的运动速度。结果显示，LT与可穿戴设备的平均速度（r = 0.85；估计标准误差[SEE] = 0.08米·秒）和峰值速度（r = 0.91，SEE = 0.1米·秒）之间具有高度相关性。此外，这两种设备在测量平均速度（组内相关系数[ICC] = 0.907）和峰值速度（ICC = 0.944）方面具有非常高的一致性，尽管观察到设备之间存在系统偏差（PUSH峰值速度低0.07 ± 0.1米·秒，p ≤ 0.05）。在测量每种负荷的3次重复时，两种设备都显示出几乎相同的可靠性（重测可靠性：LT[r = 0.98]，PUSH[r = 0.956]；ICC：LT[ICC = 0.989]，PUSH[ICC = 0.981]；变异系数[CV]：LT[CV = 4.2%]，PUSH[CV = 5.0%]）。最后，用LT（R = 0.96）和PUSH可穿戴设备（R = 0.94）测量的个体负荷 - 速度关系显示出相似的、非常高的决定系数。总之，这些结果支持使用一种经济实惠的可穿戴设备来跟踪深蹲训练期间的速度。像本研究中的这种可穿戴设备，可能对力量与体能教练具有有价值的实际应用。
