Is the Optimal Load for Maximal Power Output During Hang Power Cleans Sub-Maximal?
Is the Optimal Load for Maximal Power Output During Hang Power Cleans Sub-Maximal?
复制标题
悬吊高翻期间最大功率输出的最佳负载是否为次最大？
DOI：
10.1123/ijspp.2018-0894
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发表时间：
2019
影响因子：
3.3
通讯作者：
Okada Junichi
中科院分区：
文献类型：
--
作者：
Takei Seiichiro;Hirayama Kuniaki;Okada Junichi
目的：从机械角度来看，悬吊高翻 (HPC) 期间最大功率输出的最佳负载是 1 次最大重复 (1RM) 负载；然而，之前的研究却有不同的报道。因此，本研究旨在调查决定 HPC 期间最佳负荷的根本因素。 方法：八名竞技奥林匹克举重运动员以 1RM 的 40%、60%、70%、80%、90%、95% 和 100% 进行 HPC，同时记录地面反作用力和杆/身体运动学。 HPC 期间的成功标准设置为高于接收位置的平行蹲坐。结果：峰值功率和相对峰值功率均在 80% 1RM 时达到最大值（分别为 3975.7 [439.1] W、50.4 [6.6] W/kg）。峰值力、峰值功率下的力和相对值往往随着负载的增加而增加 (P< .001)，而峰值系统速度和峰值功率下的系统速度在 80% 1RM 以上时显着下降（分别为 P= .005 和 .011）。对于较重的负载，杆的峰值速度 (P< .001) 和杆位移 (P< .001) 也显着降低。 8 名受试者中有 7 名的峰值杆速度和杆位移之间存在很强的正相关性 (r> .90，P< .01)。接球位置的膝关节角度低于四分之一蹲位置，高于 70% 1RM。结论：当成功标准设置在平行蹲位置之上时，次最大负载确实是 HPC 最大功率输出的最佳选择。然而，当成功标准被定义为四分之一蹲位置时，最佳负荷就变成了 1RM 负荷。
Purpose:The optimal load for maximal power output during hang power cleans (HPCs) from a mechanical perspective is the 1-repetition-maximum (1RM) load; however, previous research has reported otherwise. The present study thus aimed to investigate the underlying factors that determine optimal load during HPCs.Methods:Eight competitive Olympic weight lifters performed HPCs at 40%, 60%, 70%, 80%, 90%, 95%, and 100% of their 1RM while the ground-reaction force and bar/body kinematics were simultaneously recorded. The success criterion during HPC was set above parallel squat at the receiving position.Results:Both peak power and relative peak power were maximized at 80% 1RM (3975.7 [439.1] W, 50.4 [6.6] W/kg, respectively). Peak force, force at peak power, and relative values tended to increase with heavier loads (P< .001), while peak system velocity and system velocity at peak power decreased significantly above 80% 1RM (P= .005 and .011, respectively). There were also significant decreases in peak bar velocity (P< .001) and bar displacement (P< .001) toward heavier loads. There was a strong positive correlation between peak bar velocity and bar displacement in 7 of 8 subjects (r> .90,P< .01). The knee joint angle at the receiving position fell below the quarter-squat position above 70% 1RM.Conclusions:Submaximal loads were indeed optimal for maximal power output for HPC when the success criterion was set above the parallel-squat position. However, when the success criterion was defined as the quarter-squat position, the optimal load became the 1RM load.