PDF(Pubmed)
Abstract：
Plyometric training is characterized by high-intensity exercise which is performed in short term efforts divided into sets. The purpose of the present study was twofold: first, to investigate the effects of three distinct plyometric exercise protocols, each with varying work-to-rest ratios, on muscle fatigue and recovery using an incline-plane training machine; and second, to assess the relationship between changes in lower limb muscle strength and power and the biochemical response to the three exercise variants employed. Forty-five adult males were randomly divided into 3 groups (n = 15) performing an exercise of 60 rebounds on an incline-plane training machine. The G0 group performed continuous exercise, while the G45 and G90 groups completed 4 sets of 15 repetitions, each set lasting 45 s with 45 s rest in G45 (work-to-rest ratio of 1:1) and 90 s rest in G90 (1:2 ratio). Changes in muscle torques of knee extensors and flexors, as well as blood lactate (LA) and ammonia levels, were assessed before and every 5 min for 30 min after completing the workout. The results showed significantly higher (p < 0.001) average power across all jumps generated during intermittent compared to continuous exercise. The greatest decrease in knee extensor strength immediately post-exercise was recorded in group G0 and the least in G90. The post-exercise time course of LA changes followed a similar pattern in all groups, while the longer the interval between sets, the faster LA returned to baseline. Intermittent exercise had a more favourable effect on muscle energy metabolism and recovery than continuous exercise, and the work-to-rest ratio of 1:2 in plyometric exercises was sufficient rest time to allow the continuation of exercise in subsequent sets at similar intensity.
摘要：
高度测量训练的特征是高强度运动，该运动是在分为几组的短期努力中进行的。本研究的目的是双重的：第一，为了研究三种不同的塑形运动方案的效果，每个人都有不同的作息率，使用倾斜平面训练机进行肌肉疲劳和恢复；第二，评估下肢肌肉力量和力量的变化与对三种运动变体的生化反应之间的关系。将45名成年男性随机分为3组（n=15），在倾斜平面训练机上进行60个篮板的运动。G0组进行连续运动,G45和G90小组完成了4组15次重复，每组持续45秒，G45中休息45秒（作息比为1：1），G90中休息90秒（1：2）。膝关节伸肌和屈肌扭矩的变化，以及血乳酸（LA）和氨水平，在完成锻炼之前和每5分钟评估30分钟。结果显示，与连续运动相比，间歇性运动期间产生的所有跳跃的平均功率明显更高（p<0.001）。运动后立即膝关节伸肌力量下降最大的是G0组，最小的是G90组。运动后LA的时间变化在所有组中遵循相似的模式，而集合之间的间隔越长，LA恢复到基线的速度越快。间歇运动对肌肉能量代谢和恢复的影响比连续运动更有利,和1:2的工作与休息的比例是足够的休息时间，允许继续运动在随后的设置在类似的强度。
