School of Health and Life Sciences, Federation University Australia, Ballarat, Australia; and.
School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.
J Strength Cond Res. 2021 Dec 1;35(12):3348-3354. doi: 10.1519/JSC.0000000000003325.
O'Grady, MW, Young, WB, Behm, DG, and Talpey, SW. Effect of intention to squat explosively on acute countermovement jump performance. J Strength Cond Res 35(12): 3348-3354, 2021-The purpose of this study was to investigate the influence of squatting with the intention of moving the bar as fast as possible during the ascent phase on potentiating countermovement jump (CMJ) performance. Fourteen recreationally resistance-trained men (age = 22.1 ± 1.7 years, height = 179.9 ± 4.2 cm, body mass = 83.8 ± 6.6 kg) with a predicted 1 repetition maximum half-squat of 201.0 ± 27.8 kg participated in this study. Subjects performed 3 CMJs before and then 4 and 8 minutes after a squat conditioning activity (CA). Conditions were randomized. For 1 condition, the CA involved subjects performing 4 repetitions of the half-squat with a 5RM load in a controlled manner (CON) at a self-selected normal squatting tempo. In the other condition, subjects used the same number of repetitions and load; however, they were instructed to move the bar up as fast as possible during the concentric phase of the half-squat (VMAX). Half-squat peak force (N), peak power (W), peak velocity (m·s-1), and rate of force development (RFD) were measured for each CA using a force platform and linear position transducer. At 4 and 8 minutes post-CA, CMJ height, relative peak power, peak velocity, and peak force were also measured. Despite there being significant increases in the half-squat peak power, peak velocity and maximum RFD in the VMAX condition, neither condition significantly improved any post-CMJ variable. Some small improvements in jump height were observed in certain individuals after the VMAX condition, suggesting that an explosive half-squat CA may potentiate CMJ performance in certain individuals.
奥格雷迪，MW，杨，WB，贝姆，DG，和泰尔佩，SW。意图深蹲爆发对急性反向跳跃性能的影响。J 力量与条件研究 35（12）：3348-3354，2021-本研究的目的是调查在上升阶段尽可能快地移动杠铃的深蹲意图对反跳（CMJ）性能的增强作用。14 名娱乐性抗阻训练的男性（年龄=22.1±1.7 岁，身高=179.9±4.2cm，体重=83.8±6.6kg），预测 1 次最大半蹲 201.0±27.8kg 参加了这项研究。受试者在 3 次 CMJ 之前，然后在半蹲调节活动（CA）后 4 分钟和 8 分钟进行了 4 次 CMJ。条件是随机的。对于 1 种情况，CA 涉及受试者以自我选择的正常深蹲速度以受控方式进行 4 次半蹲重复，负荷为 5RM（CON）。在另一种情况下，受试者使用相同的重复次数和负荷；然而，他们被指示在半蹲的向心阶段尽可能快地移动杠铃（VMAX）。使用力平台和线性位置传感器测量每个 CA 的半蹲峰值力（N）、峰值功率（W）、峰值速度（m·s-1）和力发展速率（RFD）。在 CA 后 4 分钟和 8 分钟，还测量了 CMJ 高度、相对峰值功率、峰值速度和峰值力。尽管 VMAX 条件下半蹲峰值功率、峰值速度和最大 RFD 有显著增加，但两种条件都没有显著改善任何 CMJ 后变量。在 VMAX 条件后，某些个体的跳跃高度略有提高，这表明剧烈的半蹲 CA 可能会增强某些个体的 CMJ 性能。
