Fu Keqi, Chen Lingying, Poon Eric Tsz-Chun, Wang Rou, Li Qian, Liu Haochong, Ho Indy Man Kit
Department of Public Physical, Zhejiang Chinese Medical University, Zhejiang, China.
Department of Health and Physical Education, The Education University of Hong Kong, Tai Po, Hong Kong, China.
Front Physiol. 2023 Jul 18;14:1217045. doi: 10.3389/fphys.2023.1217045. eCollection 2023.
The study aimed to investigate the post-activation performance enhancement (PAPE) of flywheel training (FT) on lower limb explosive power performance. Using a randomized crossover design, 20 trained men (age = 21.5 ± 1.4 years; training experience 5.5 ± 1.2 years) completed seven main conditions after three familiarization sessions. The first three conditions tested the PAPE of the FT on the counter movement jump (CMJ) under three different inertial loads (0.041 kg·m as L; 0.057 kg·m as ML; and 0.122 kg·m as P), whereas the following four conditions tested the PAPE of FT on the 30 m sprint, which consisted of three inertial loads (L, ML, and P) and a control condition. Participants were required to perform the CMJ or 30 m sprint at baseline (Tb) and immediately (T0), 4 min (T4), 8 min (T8), 12 min (T12), and 16 min (T16) after exercise, respectively. The results of the CMJ conditions showed that PAPE peaked at T4 ( < 0.01) and almost subsided at T12 ( > 0.05) in ML and P conditions. Meanwhile, PAPE appeared earlier in the P condition, and the effect was more significant (P:ES = 1.09; ML:ES = 0.79). 30 m sprint results showed significant improvement only in the ML condition. The PAPE peaked at T4 ( < 0.05, ES = -0.47) and almost subsided at T8 ( > 0.05). It was mainly due to the significant enhancement of the 10-30 m segmental timing performance at T4 ( < 0.05, ES = -0.49). This study indicates that the size of the inertial load could influence the magnitude of the PAPE produced by the explosive force of the lower limb. The PAPE of the vertical explosive force increased with increasing inertial load, but the PAPE of the horizontal explosive force did not appear at the maximum inertial load. The most effective elicitation of the PAPE was at 4-8 min after the FT.
本研究旨在探讨飞轮训练（FT）对下肢爆发力表现的激活后表现增强（PAPE）情况。采用随机交叉设计，20名受过训练的男性（年龄=21.5±1.4岁；训练经验5.5±1.2年）在进行三次适应性训练后完成了七个主要条件。前三个条件测试了在三种不同惯性负荷（0.041kg·m为L；0.057kg·m为ML；0.122kg·m为P）下FT对反向纵跳（CMJ）的PAPE，而后四个条件测试了FT对30米短跑的PAPE，其中包括三种惯性负荷（L、ML和P）以及一个对照条件。要求参与者分别在基线（Tb）以及运动后即刻（T0）、4分钟（T4）、8分钟（T8）、12分钟（T12）和16分钟（T16）进行CMJ或30米短跑。CMJ条件的结果显示，在ML和P条件下，PAPE在T4时达到峰值（P<0.01），在T12时几乎消退（P>0.05）。同时，P条件下PAPE出现得更早，且效果更显著（P：效应量=1.09；ML：效应量=0.79）。30米短跑结果显示仅在ML条件下有显著改善。PAPE在T4时达到峰值（P<0.05，效应量=-0.47），在T8时几乎消退（P>0.05）。这主要是由于T4时10 - 30米分段计时表现的显著增强（P<0.05，效应量=-0.49）。本研究表明，惯性负荷的大小可能会影响下肢爆发力产生的PAPE的幅度。垂直爆发力的PAPE随惯性负荷增加而增加，但水平爆发力的PAPE在最大惯性负荷时未出现。FT后4 - 8分钟是引发PAPE最有效的时间。
