Fry A C, Kraemer W J, Stone M H, Warren B J, Kearney J T, Maresh C M, Weseman C A, Fleck S J
College of Osteopathic Med., Ohio U., Athens 45701.
Int J Sport Nutr. 1993 Sep;3(3):306-22. doi: 10.1123/ijsn.3.3.306.
To examine the effects of 1 week of high volume weightlifting and amino acid supplementation, 28 elite junior male weightlifters received either amino acid (protein) or lactose (placebo) capsules using double-blind procedures. Weightlifting test sessions were performed before and after 7 days of high volume training sessions. Serum concentrations of testosterone (Tes), cortisol (Cort), and growth hormone (GH) as well as whole blood lactate (HLa) were determined from blood draws. Lifting performance was not altered for either group after training, although vertical jump performance was not altered for either group after training, although vertical jump performance decreased for both groups. Both tests elicited significantly elevated exercise-induced hormonal and HLa concentrations. Significant decreases in postexercise hormonal and HLa concentrations from Test 1 to Test 2 were observed for both groups. Tes concentrations at 7 a.m. and preexercise decreased for both groups from Test 1 to Test 2, while the placebo group exhibited a decreased 7 a.m. Tes/Cort. These data suggest that amino acid supplementation does not influence resting or exercise-induced hormonal responses to 1 week of high volume weight training, but endocrine responses did suggest an impending over-training syndrome.
为研究为期1周的大运动量举重训练及补充氨基酸的效果，28名精英青少年男性举重运动员采用双盲程序，分别服用氨基酸（蛋白质）胶囊或乳糖（安慰剂）胶囊。在进行7天的大运动量训练课程前后，进行举重测试。通过采血测定血清睾酮（Tes）、皮质醇（Cort）、生长激素（GH）浓度以及全血乳酸（HLa）水平。训练后两组的举重表现均未改变，尽管两组的垂直跳表现均未改变，但两组的垂直跳成绩均有所下降。两项测试均使运动诱导的激素和HLa浓度显著升高。两组从测试1到测试2，运动后激素和HLa浓度均显著下降。从测试1到测试2，两组上午7点和运动前的Tes浓度均下降，而安慰剂组上午7点的Tes/Cort下降。这些数据表明，补充氨基酸并不影响对1周大运动量举重训练的静息或运动诱导的激素反应，但内分泌反应确实提示有即将出现过度训练综合征的迹象。
