Loturco Irineu, McGuigan Michael R, Pereira Lucas A, Pareja-Blanco Fernando
NAR - Nucleus of High Performance in Sport, São Paulo, Brazil.
Department of Human Movement Sciences, Federal University of São Paulo, São Paulo, Brazil.
Biol Sport. 2023 Apr;40(2):611-614. doi: 10.5114/biolsport.2023.118019. Epub 2022 Sep 6.
The purpose of this study was to test the load-velocity relationship in the jump squat (JS) exercise using three different velocity parameters (mean velocity [MV], mean propulsive velocity [MPV], and peak velocity [PV]). Twenty-six male rugby union players (24.3 ± 3.9 years; 1.81 ± 0.09 m; 101.3 ± 15.4 kg) performed a progressive loading test in the JS with loads corresponding to 20, 40, 60, and 80% of the half-squat 1RM (equivalent to 24, 46, 70, and 94% of the estimated JS-1RM). MV, MPV, and PV were continuously recorded during all attempts using a linear velocity transducer. Linear regression models were used to determine the relationships between JS loads and MV, MPV, and PV. Bar-velocity outputs demonstrated high levels of consistency and reliability (coefficient of variation ≤ 5% and intraclass correlation coefficient ≥ 0.90). The predictive power of MV, MPV, and PV were ≥ 91%, for all tested variables (P < 0.0001). The equations and bar-velocity values provided in this study can be used by coaches to precisely determine and prescribe JS training loads, from verylight to heavy loading conditions (i.e., ~20-100% JS 1RM).
本研究的目的是使用三种不同的速度参数（平均速度[MV]、平均推进速度[MPV]和峰值速度[PV]）来测试深蹲跳（JS）练习中的负荷-速度关系。26名男性橄榄球联盟球员（24.3±3.9岁；身高1.81±0.09米；体重101.3±15.4千克）在JS练习中进行了渐进式负荷测试，负荷分别相当于半蹲1RM的20%、40%、60%和80%（相当于估计的JS-1RM的24%、46%、70%和94%）。在所有测试尝试过程中，使用线性速度传感器连续记录MV、MPV和PV。采用线性回归模型来确定JS负荷与MV、MPV和PV之间的关系。杠铃速度输出显示出高度的一致性和可靠性（变异系数≤5%，组内相关系数≥0.90）。对于所有测试变量，MV、MPV和PV的预测能力均≥91%（P<0.0001）。本研究中提供的方程和杠铃速度值可供教练用于精确确定和规定JS训练负荷，范围从非常轻到重负荷条件（即~20-100%JS 1RM）。
