Smilios I, Pilianidis T, Karamouzis M, Parlavantzas A, Tokmakidis S P
Department of Physical Education and Sport Science, Democritus University of Thrace, Komotini, Greece.
Int J Sports Med. 2007 May;28(5):401-6. doi: 10.1055/s-2006-924366. Epub 2006 Oct 6.
This study examined testosterone, cortisol and growth hormone responses in elderly and young men after a strength endurance protocol. Eight elderly (age: 69 +/- 5 yrs) and nine young (age: 23 +/- 1 yrs) males with recreational experience in resistance training performed a strength endurance protocol, which included six exercises. At each exercise, the subjects performed 3 sets of 15 reps at 60 % of 1-RM with a 90 s rest interval between sets. The subjects also participated in a control session. Hormonal and blood lactate concentrations were measured before exercise, immediately after exercise and 15 min after the end of exercise. Blood lactate increased (p<0.05) with resistance exercise in both age groups with the highest increases observed in the young males. Testosterone and cortisol concentrations were higher (p<0.05) immediately and 15 min after exercise as compared to the respective control session values in both young and elderly subjects, whereas no differences were observed between groups (p>0.05). Growth hormone concentration increased (p<0.05) after resistance exercise compared to the control session in both age groups. This increase was higher (p<0.05) in the young as compared to the elderly group. The above results show that a moderate intensity - high repetition resistance exercise protocol for the improvement of strength endurance, seems to be a sufficient stimulus that increases testosterone, growth hormone and cortisol concentrations in elderly males. These hormonal responses may create an optimal metabolic environment, which improves muscular function after a strength endurance program although the elderly subjects present an attenuated growth hormone response compared to younger ones.
本研究检测了老年男性和年轻男性在进行力量耐力训练方案后的睾酮、皮质醇和生长激素反应。八名有抗阻训练经验的老年男性（年龄：69±5岁）和九名年轻男性（年龄：23±1岁）进行了一项力量耐力训练方案，该方案包括六项练习。在每项练习中，受试者以1-RM的60%进行3组，每组15次重复，组间休息90秒。受试者还参与了一次对照实验。在运动前、运动后即刻以及运动结束后15分钟测量激素和血乳酸浓度。两个年龄组的血乳酸在抗阻运动后均升高（p<0.05），其中年轻男性升高幅度最大。与各自对照实验值相比，年轻和老年受试者运动后即刻及15分钟时的睾酮和皮质醇浓度均更高（p<0.05），而两组之间未观察到差异（p>0.05）。与对照实验相比，两个年龄组抗阻运动后生长激素浓度均升高（p<0.05）。与老年组相比，年轻组的升高幅度更高（p<0.05）。上述结果表明，用于提高力量耐力的中等强度 - 高重复次数抗阻训练方案似乎是一种足够的刺激，可提高老年男性的睾酮、生长激素和皮质醇浓度。这些激素反应可能会创造一个最佳的代谢环境，尽管老年受试者与年轻受试者相比生长激素反应减弱，但在力量耐力训练方案后仍可改善肌肉功能。
