Biodynamics Laboratory, Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, Kentucky, USA.
J Strength Cond Res. 2010 Jan;24(1):207-12. doi: 10.1519/JSC.0b013e3181c3b841.
The purpose of this study was to quantify the vertical ground reaction forces (VGRFs) developed during the performance of popular bilateral plyometric movements. Fourteen power-oriented track and field men of collegiate and national level randomly performed 3 trials of 9 different bilateral plyometric exercises in a single testing session. Three depth drop (DD) and 3 depth jump (DJ) conditions from 30, 60, and 90 cm heights (DD30, DD60, and DD90 and DJ30, DJ60, and DJ90) were tested, in addition to vertical jump (VJ), standing long jump (SLJ), and 2 consecutive jump (2CJ) conditions. Peak impact VGRFs were normalized to body weight. Additionally, all conditions were compared against the VJ in an intensity index. The SLJ condition resulted in a significantly higher peak VGRF than the 2CJ condition (p < or = 0.05). 90DD, 90DJ, 60DD, and SLJ had a significantly greater peak VGRF (5.39, 4.93, 4.30, and 4.22 times body weight, respectively) than the VJ condition (3.34 times body weight). The 30DJ condition had an insignificantly smaller peak VGRF (2.78 times body weight) when compared with the VJ. Practitioners may use these findings to more effectively progress athletes in these movements based on their intensities.
本研究的目的是量化在进行流行的双侧弹震式运动时产生的垂直地面反作用力（VGRF）。14 名具有竞技和国家级水平的力量型田径运动员在单次测试中随机进行了 3 次 9 种不同的双侧弹震式练习。测试了 3 个深度下降（DD）和 3 个深度跳跃（DJ）条件，高度分别为 30、60 和 90 厘米（DD30、DD60 和 DD90 和 DJ30、DJ60 和 DJ90），此外还有垂直跳跃（VJ）、站立跳远（SLJ）和 2 连续跳跃（2CJ）条件。峰值冲击 VGRF 被归一化为体重。此外，所有条件都与 VJ 进行了强度指数比较。SLJ 条件的峰值 VGRF 明显高于 2CJ 条件（p<0.05）。90DD、90DJ、60DD 和 SLJ 的峰值 VGRF 明显高于 VJ 条件（分别为 5.39、4.93、4.30 和 4.22 倍体重）。与 VJ 相比，30DJ 条件的峰值 VGRF 较小（2.78 倍体重），但差异无统计学意义。从业者可以根据这些运动的强度更有效地让运动员在这些运动中取得进步。
