Acute hormonal responses to heavy resistance exercise in younger and older men

1998 ◽  
Vol 77 (3) ◽  
pp. 206-211 ◽  
Author(s):  
William J. Kraemer ◽  
Keijo H�kkinen ◽  
Robert U. Newton ◽  
Matthew McCormick ◽  
Bradley C. Nindl ◽  
...  

1999 ◽  
Vol 31 (Supplement) ◽  
pp. S268
Author(s):  
N. Ratamess ◽  
W. Kraemer ◽  
S. Fleck ◽  
C. Maresh ◽  
K. Goetz ◽  
...  


2013 ◽  
Vol 32 (1) ◽  
pp. 66-74 ◽  
Author(s):  
William J. Kraemer ◽  
Glenn Solomon-Hill ◽  
Brittanie M. Volk ◽  
Brian R. Kupchak ◽  
David P. Looney ◽  
...  






1998 ◽  
Vol 85 (4) ◽  
pp. 1544-1555 ◽  
Author(s):  
William J. Kraemer ◽  
Jeff S. Volek ◽  
Jill A. Bush ◽  
Margot Putukian ◽  
Wayne J. Sebastianelli

Nine resistance-trained men consumed either a protein-carbohydrate supplement or placebo for 1 wk in a crossover design separated by 7 days. The last 3 days of each treatment, subjects performed resistance exercise. The supplement was consumed 2 h before and immediately after the workout, and blood was obtained before and after exercise (0, 15, 30, 45, and 60 min postexercise). Lactate, growth hormone, and testosterone were significantly ( P ≤ 0.05) elevated immediately postexercise. The lactate response was significantly lower during supplementation on days 2 and 3. Growth hormone and prolactin responses on day 1 were significantly higher during supplementation. After exercise, testosterone declined below resting values during supplementation. Cortisol decreased immediately postexercise on day 1; the response was diminished on days 2 and 3. Glucose and insulin were significantly elevated by 30 min during supplementation and remained stable during placebo. Insulin-like growth factor-I was higher during supplementatiom on days 2 and 3. These data indicate that protein-carbohydrate supplementation before and after training can alter the metabolic and hormonal responses to consecutive days of heavy-resistance exercise.



1997 ◽  
Vol 22 (3) ◽  
pp. 244-255 ◽  
Author(s):  
Lincoln Allan Gotshalk ◽  
Chad C Loebel ◽  
Bradley C Nindl ◽  
Margot Putukian ◽  
Wayne J Sebastianelli ◽  
...  

The purpose of this study was to compare serum growth hormone (GH), testosterone (T), cortisol (C) and whole blood lactate (L) responses to single set (1S) versus multiple set (3S) heavy-resistance exercise protocols. Eight recreationally weight-trained men completed two identical resistance exercise workouts (1S vs. 3S). Blood was obtained prexcerise (PRE), immediately postexercise (0P), and 5 min (5P), 15 min (15P), 30 min and 60 min (60P) postexercise and was analyzed for GH, T, C, and L levels. For 1S and 3S, GH, L, and T significantly increased from PRE to 0P and remained significantly elevated to 60P, except for 1S. For GH, T, and L, 3S showed significantly greater increases compared to 1S. For C, 3S and 1S were increased significantly from resting at 0P, 5P, and 15P; 3S increased compared to 1S at 5P, 15P and 30P. Higher volumes of total work produce significantly greater increases in circulating anabolic hormones during the recovery phase following exercise. Key words: growth hormone, testosterone, cortisol, lactate, strength



Steroids ◽  
2011 ◽  
Vol 76 (1-2) ◽  
pp. 183-192 ◽  
Author(s):  
Juha P. Ahtiainen ◽  
Juha J. Hulmi ◽  
William J. Kraemer ◽  
Maarit Lehti ◽  
Kai Nyman ◽  
...  


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