Muscle Physiology and Human Performance Research Group, Center of Physical Education and Sports, Federal University of Espirito Santo, Av. Fernando Ferrari, 514, Campus Universitário, Goiabeiras, Vitória, ES, 29075-810, Brazil.
Massey Institute of Food Science and Technology, College of Health, Massey University, Palmerston North, New Zealand.
J Int Soc Sports Nutr. 2018 Oct 22;15(1):51. doi: 10.1186/s12970-018-0258-3.
Post-activation potentiation (PAP) is the phenomenon by which muscular performance is enhanced in response to a conditioning stimulus. PAP has typically been evidenced via improved counter movement jump (CMJ) performance. This study examined the effects of PAP, with and without prior caffeine ingestion, on CMJ performance.
Twelve male professional soccer players (23 ± 5 years) performed two trials of plyometric exercises and sled towing 60 min after placebo or caffeine ingestion (5 mg.kg) in a randomized, counterbalanced and double-blinded design. CMJ performance was assessed at baseline and 1, 3 and 5 min after the conditioning stimulus (T1, T3 and T5, respectively).
Two way ANOVA main effects indicated a significant difference in jump height after the PAP protocol (F[3, 11] = 14.99, P < 0.001, partial η2 = 0.577). Analysis also indicated a significant difference in CMJ performance across conditions, with caffeine eliciting a greater response (F[1, 11] = 10.12, P = 0.009, partial η2 = 0.479). CMJ height was increased at T1, T3 and T5 in caffeine condition (5.07%, 5.75% and 5.40%, respectively; P < 0.01) compared to baseline. In the placebo condition, jump performance was increased at T3 (4.94%; P < 0.01) only. Jump height was higher in caffeine condition on T1, T3 and T5 (P < 0.05) but not on baseline (P > 0.05) compared to placebo.
The results of this study suggest that acute plyometric and sled towing stimuli enhances jump performance and that this potentiation is augmented by caffeine ingestion in male soccer players.
后激活增强（PAP）是一种肌肉性能在受到条件刺激后增强的现象。PAP 通常通过改善反冲式跳跃（CMJ）性能来证明。本研究检查了 PAP 的影响，包括有无预先摄入咖啡因，对 CMJ 性能的影响。
12 名男性职业足球运动员（23±5 岁）在安慰剂或咖啡因（5mg.kg）摄入后 60 分钟，以随机、平衡和双盲设计进行两次弹震式练习和雪橇牵引试验。CMJ 性能在基线和条件刺激后 1、3 和 5 分钟（分别为 T1、T3 和 T5）进行评估。
双向方差分析的主要影响因素表明，在 PAP 方案后跳跃高度有显著差异（F[3, 11] = 14.99，P < 0.001，部分 η2 = 0.577）。分析还表明，在不同条件下 CMJ 性能存在显著差异，咖啡因引起的反应更大（F[1, 11] = 10.12，P = 0.009，部分 η2 = 0.479）。在咖啡因条件下，T1、T3 和 T5 时 CMJ 高度增加（分别为 5.07%、5.75%和 5.40%；P < 0.01），与基线相比。在安慰剂条件下，仅在 T3 时跳跃性能增加（4.94%；P < 0.01）。与安慰剂相比，在咖啡因条件下 T1、T3 和 T5 时跳跃高度更高（P < 0.05），但在基线时则没有（P > 0.05）。
本研究结果表明，急性弹震式和雪橇牵引刺激可增强跳跃性能，而这种增强作用可通过男性足球运动员摄入咖啡因来增强。
