Exercise Physiology Laboratory, Department of Physical Education and Sports, Faculty of Medicine, University of Malaga, Malaga, Spain.
EADE-University of Wales Trinity Saint David, Malaga, Spain.
PLoS One. 2021 Dec 2;16(12):e0260866. doi: 10.1371/journal.pone.0260866. eCollection 2021.
This study aimed to compare the post-activation performance enhancement (PAPE) induced by isometric and isotonic exercise on vertical jump performance.
18 healthy trained men (25.8±2.7 years; 78.4±8.2 kg; 175.7±6.1 cm; 25.4±1.8 BMI; 126.72±10.8 kg squat 1-RM) volunteered for this study. They randomly performed two different PAPE protocols: Isotonic squats (ISOTS), which consisted of 2 sets of 3 repetitions at 75% of one-maximum repetition (1-RM); and isometric squats (ISOMS), which consisted of 2 sets of 4 seconds of submaximal (75% of 1-RM) isometric contraction at 90°-knee flexion. Countermovement jump (CMJ) height was tested at baseline and 4 minutes after each conditioning set.
CMJ height significantly increased after set 1 in both PAPE protocols (ISOMS: p <0.001; ES = 0.34; ISOTS: p <0.001; ES = 0.24), with respect to the baseline jump. However, after set 2 no significant changes in CMJ height were observed for any protocol (ISOMS: p = 0.162; ES = 0.11; ISOTS: p = 0.976; ES = 0.06). No significant differences (p>0.05) were found between both isometric and isotonic exercise conditions.
Despite both protocols showed similar PAPE effects on CMJ height after set 1, none of the protocols demonstrated greater efficacy in increasing subsequent performance in healthy trained men.
本研究旨在比较等长和等张运动对垂直跳跃表现的后激活性能增强（PAPE）效果。
18 名健康训练有素的男性（25.8±2.7 岁；78.4±8.2 公斤；175.7±6.1 厘米；25.4±1.8 BMI；126.72±10.8 公斤深蹲 1-RM）自愿参加了这项研究。他们随机进行了两种不同的 PAPE 方案：等动深蹲（ISOTS），包括 2 组 3 次，最大重复次数（1-RM）的 75%；和等长深蹲（ISOMS），包括 2 组 4 秒的亚最大（1-RM 的 75%）90°屈膝等长收缩。在每个训练组后 4 分钟测试下蹲跳（CMJ）高度。
在两种 PAPE 方案中，CMJ 高度在第 1 组后均显著增加（ISOMS：p <0.001；ES = 0.34；ISOTS：p <0.001；ES = 0.24），与基线跳跃相比。然而，在第 2 组后，任何方案的 CMJ 高度均未观察到显著变化（ISOMS：p = 0.162；ES = 0.11；ISOTS：p = 0.976；ES = 0.06）。两种等长和等张运动条件之间没有发现显著差异（p>0.05）。
尽管两种方案在第 1 组后均显示出对 CMJ 高度相似的 PAPE 效果，但在健康训练有素的男性中，没有任何方案显示出更大的增加后续表现的效果。
