The role of anabolic hormone secretions induced by resistance exercise in muscular adaptations

这项研究考察了阻力运动后合成激素分泌对肌肉适应的影响。我们通过两个独立的实验初步研究了长期运动训练后运动诱导的合成激素反应和肌肉肥大之间的关系(研究问题1)。然后，我们重点研究了急性激素反应对运动后肌肉功能恢复动力学的影响(研究问题2)。在研究问题1中，研究结果表明，阻力运动后生长激素(GH)反应的幅度与训练期后肌肉肥大的幅度一致。此外，在每组运动中加入短暂的组内休息时间，会抑制GH的分泌，并显著减轻长期运动训练后的肌肉肥大。在第二期研究中，研究结果表明，阻力运动后的急性GH反应可能与运动后最大肌力的恢复有关，表明运动后GH的分泌对促进活跃肌肉的蛋白质合成具有良好的作用。这些结果表明，合成代谢激素的分泌，尤其是GH的分泌，可能与单次运动后恢复期肌肉肥大和活跃肌肉蛋白质合成的增强有关。因此，在针对肌肉肥大的情况下，GH分泌明显的运动方案是有效的。

This study examined that the impact of anabolic hormone secretions after resistance exercise on muscular adaptations. We initially investigated the relationship between exercise-induced anabolic hormone responses and muscular hypertrophy following long-term of exercise training with two separate experiments (research issue 1). Then, we focused on the influences of acute hormone responses on post-exercise recovery kinetics of muscular function (research issue 2).In research issue 1, the results showed that magnitude of growth hormone(GH) response after resistance exercise was consistent with that of muscular hypertrophy following training period. In addition, brief intra-set rest periods inserted into each set of exercise caused a suppression of GH secretion, and markedly attenuated muscular hypertrophy after long-term exercise training.In research issue 2, the results showed that magnitude of acute GH response after resistance exercise might be associated with post-exercise recovery of maximal muscular strength, suggesting that post-exercise GH secretion has a favorable effect on enhancement of protein synthesis in active muscles.These results suggest that secretions of anabolic hormones, especially that of GH, may be related to both muscular hypertrophy and enhancement of protein synthesis in active muscles during recovery period after a single exercise bout. Therefore, the exercise regimen with marked GH secretion would be effective, when aiming for muscular hypertrophy.