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首页> 外文期刊>Revista Brasileira de Cineantropometria & Desempenho Humano >Grandes volumes s?o necessários para reduzir o desempenho muscular em indivíduos bem treinados
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Grandes volumes s?o necessários para reduzir o desempenho muscular em indivíduos bem treinados

机译：需要大量训练以减少训练有素的个体的肌肉表现

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A specific drop jumps (DJs) protocol (using 100 jumps) has been largely used to induce muscle damage. However, it failed to show relevant drop in performance in well-trained individuals. Trained subjects may require a protocol with greater volume to induce decrease of muscle performance. The aim of this study was to assess muscle performance after two DJs damaging protocols with different volumes in well-trained individuals. Eighteen strength and/or power-trained males (4.92 ± 2.78 years of training experience) were randomly assigned into one of two groups: DJ100 (five sets of 20 DJs) or DJ140 (seven sets of 20 DJs), with 2-min of rest interval. DJs were performed from a 60-cm box. After landing, the volunteers performed a maximal vertical rebound jump. Muscle swelling increased significantly on both DJ100 and DJ140 (p 0.001). Maximal isometric torque (MIT) decreased significantly on both DJ100 (p = 0.005) and DJ140 (p 0.001). MIT showed no between-group difference on pre-assessment (p = 0.815). However, on post-assessment, MIT was significantly lower on DJ140 than DJ100 (p = 0.043). Countermovement jump (CMJ) decreased significantly on DJ140 (p = 0.001), but not on DJ100 (p = 0.802). There was no between-group difference on pre-assessment (p = 0.978). However, on post-assessment, CMJ was significantly lower on DJ140 than DJ100 (p = 0.038). DJ140 induced greater drop in isometric strength than DJ100 and only DJ140 significantly reduced jump performance. These results demonstrated that well-trained individuals require a great volume of DJs to reduce substantially muscle performance.
机译：特定的跌落跳跃（DJ）协议（使用100次跳跃）已被广泛用于诱发肌肉损伤。但是，它没有显示出训练有素的人的相关性能下降。受过训练的受试者可能需要更大容量的规程以诱导肌肉性能下降。这项研究的目的是评估受过良好训练的个体在不同体积的两种DJ损伤方案后的肌肉性能。将18名力量和/或力量训练的男性（4.92±2.78年的训练经验）随机分为两组：DJ100（五组20个DJ）或DJ140（七组20个DJ），其中2分钟为休息间隔。 DJ从60厘米的盒子中进行。着陆后，志愿者进行了最大的垂直反弹。 DJ100和DJ140的肌肉肿胀显着增加（p <0.001）。 DJ100（p = 0.005）和DJ140（p <0.001）的最大等距扭矩（MIT）均显着降低。麻省理工学院在预评估中未显示组间差异（p = 0.815）。但是，在评估后，DJ140上的MIT显着低于DJ100（p = 0.043）。反向运动跳跃（CMJ）在DJ140上显着降低（p = 0.001），但在DJ100上没有显着降低（p = 0.802）。评估前的组间无差异（p = 0.978）。但是，在评估后，DJ140的CMJ明显低于DJ100（p = 0.038）。 DJ140引起的等距强度下降幅度大于DJ100，只有DJ140显着降低了跳跃性能。这些结果表明，训练有素的个人需要大量的DJ才能大大降低肌肉的表现。

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