Endocrine and Performance Responses to High Volume Training and Amino Acid Supplementation in Elite Junior Weightlifters

in International Journal of Sport Nutrition and Exercise Metabolism
Restricted access

Purchase article

USD $24.95

Student 1 year subscription

USD $87.00

1 year subscription

USD $116.00

Student 2 year subscription

USD $165.00

2 year subscription

USD $215.00

To examine the effects of 1 week of high volume weightlifting and amino acid supplementation, 28 elite junior male weightlifting 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 iactate (HLa) were determined from blood draws. Lifting 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 overtraining syndrome.

Fry is with the College of Osteopathic Med., Ohio U., Athens, OH 45701. Kraemer is with the Center for Sports Med., Penn State U., University Park, PA 16801. Stone and Warren are with the Dept. of Health, Leisure and Exercise Science, Appalachian State U., Boone, NC 28608. Kearney and Fleck are with the Sports Science and Technology Div., U.S. Olympic Committee, Colorado Springs, CO 80909. Maresh is with the Human Performance Lab, U. of Connecticut, Storrs, CT 06269. Weseman is with the John B. Pierce Lab., Yale Medical Ctr., New Haven, CT 06519. Request reprints from Dr. Kraemer.

International Journal of Sport Nutrition and Exercise Metabolism