Bottaro Martim, Martins Breno, Gentil Paulo, Wagner Dale
College of Physical Education and Exercise Science, University of Brasilia, Brazil.
J Sci Med Sport. 2009 Jan;12(1):73-8. doi: 10.1016/j.jsams.2007.10.013. Epub 2008 Feb 21.
This study investigated the acute hormonal response to three different rest periods between sets of a traditional lower body resistance training session in young women. Twelve healthy trained females (26.83+/-3.93 years) participated in the study. On three separate sessions of a lower body resistance exercise protocol, subjects were assigned in a random order a rest interval of 30s (P30), 60s (P60) or 120s (P120) between sets. The resistance exercise session consisted of four lower body exercises with three sets performed until contractile failure using 10-repetition maximum (RM) load. Blood samples were drawn for determination of serum growth hormone (GH) and cortisol concentrations before exercise (T0), immediately after each training session (T1), and after 5min (T5), 15min (T15), and 30min (T30) of recovery. Statistical evaluation of the area under the time-concentration relationship for GH (GHauc) and for cortisol (Cauc) were analyzed using a one-way ANOVA There were no differences among protocols (P30, P60 and P120) in the serum GH and cortisol concentrations at baseline (T0). However, as compared to T0, all protocols led to acute increases (p<0.05) in serum GH concentrations after each training session. The GHauc was greater for P30 than for both P60 and P120, however, there were no differences between P60 and P120. The Cauc were not different among protocols. Thus, the magnitude of acute GH responses in previously strength-trained women appears greater with a 30-s rest interval between sets compared to longer rest periods of 60- or 120-s.
本研究调查了年轻女性在进行传统下肢抗阻训练时，每组训练之间三种不同休息时间的急性激素反应。12名健康的受过训练的女性（26.83±3.93岁）参与了该研究。在下肢抗阻运动方案的三个不同时间段，受试者被随机分配在每组训练之间有30秒（P30）、60秒（P60）或120秒（P120）的休息间隔。抗阻训练课程包括四项下肢运动，每组进行三组，直至使用10次最大重复量（RM）负荷达到收缩力衰竭。在运动前（T0）、每次训练后立即（T1）以及恢复5分钟（T5）、15分钟（T15）和30分钟（T30）后采集血样，以测定血清生长激素（GH）和皮质醇浓度。使用单因素方差分析对GH（GHauc）和皮质醇（Cauc）的时间-浓度关系曲线下面积进行统计评估。在基线（T0）时，各方案（P30、P60和P120）之间的血清GH和皮质醇浓度没有差异。然而，与T0相比，所有方案在每次训练后血清GH浓度均出现急性升高（p<0.05）。P30的GHauc大于P60和P120，但P60和P120之间没有差异。各方案之间的Cauc没有差异。因此，与60秒或120秒的较长休息时间相比，在每组训练之间有30秒休息间隔时，先前进行过力量训练的女性的急性GH反应幅度似乎更大。
