Cardiff School of Sport, University of Wales Institute, Cardiff, United Kingdom.
J Strength Cond Res. 2010 Jul;24(7):1911-6. doi: 10.1519/JSC.0b013e3181dc47f8.
The performance characteristics of skeletal muscle are transient in nature and have been shown to be significantly affected by its contractile history, where the phenomenon of acute enhancement is termed postactivation potentiation (PAP). Acute enhancement of dynamic activity has been observed when preceded by resistance exercises; however little information exists for plyometric activity as a conditioning stimulus. In addition, no study has examined PAP effects on more than one subsequent performance trial. The purpose of the present study was to determine whether countermovement jump (CMJ) performance could be enhanced if preceded by heavy-resistance exercise or by dynamic plyometric activity over 3 trials. Thirteen anaerobically trained male subjects (mean +/- SD: age, 22 +/- 3 years; height, 182.4 +/- 4.3 cm; body mass, 82.7 +/- 9.2 kg) performed in a counterbalanced order 3 half squats using a 3 repetition maximum loading (SQUAT), a set of 24 contacts of lower body plyometric exercises (PLYO), or a control of no activity (REST) 5 minutes before each CMJ. Three sets of each treatment and CMJ were performed in total and maximal displacement (dmax), peak power (Ppeak), and peak vertical force (Fpeak) were recorded, whereas rate of force development and relative force (F/body mass) were calculated for every trial. No significant differences were revealed for any of the other variables, but greater displacement was found for SQUAT compared to REST or PLYO, whereas no differences were revealed for any of the conditions for the repeated trials. Although heavy resistance-induced PAP seems to enhance jump height compared to REST or PLYO in repeated CMJ performance, it has no additional benefit on repeated trials.
骨骼肌的性能特征是暂时的，并且已经被证明会受到其收缩历史的显著影响，其中急性增强的现象被称为激活后增强（PAP）。在进行抗阻运动之前，已经观察到动态活动的急性增强；然而，作为一种调节刺激，关于增强式练习的信息很少。此外，没有研究检查过 PAP 对超过一次后续表现测试的影响。本研究的目的是确定如果在进行大阻力运动或动态增强式练习之前，进行反跳式跳跃（CMJ），是否可以提高 CMJ 的表现。13 名无氧训练的男性受试者（平均值±SD：年龄 22±3 岁；身高 182.4±4.3cm；体重 82.7±9.2kg）以 3 次重复最大负荷（半蹲，SQUAT）、24 次下肢增强式练习（PLYO）或无活动（REST）的顺序进行半蹲，每组 3 次，在每次 CMJ 前 5 分钟进行。总共进行了 3 组每种处理和 CMJ，记录了最大位移（dmax）、峰值功率（Ppeak）和峰值垂直力（Fpeak），而每个试验的力发展速率和相对力（F/体重）都进行了计算。除了 SQUAT 与 REST 或 PLYO 相比，位移更大外，其他变量均无显著差异，而对于重复试验，任何条件下都没有差异。虽然与 REST 或 PLYO 相比，大阻力诱导的 PAP 似乎可以提高跳跃高度，但在重复 CMJ 表现中，它对重复试验没有额外的益处。
