Acute Hormonal Responses to a Single Bout of Heavy Resistance Exercise in Trained Power Lifters and Untrained Men

The purpose of this study was to investigate the acute responses of both stress and fluid regulatory hormones to a single bout of resistance exercise in both trained and untrained men. Seven competitive power lifters (PL) and 12 untrained subjects (UT) performed one set of the leg press exercise to...

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Bibliographic Details
Published in:Canadian journal of applied physiology 1999-12, Vol.24 (6), p.524-537
Main Authors: Kraemer, William J, Fleck, Steven J, Maresh, Carl M, Ratamess, Nicholas A, Gordon, Scott E, Goetz, Kenneth L, Harman, Everett A, Frykman, Peter N, Volek, Jeff S, Mazzetti, Scott A, Fry, Andrew C, Marchitelli, Louis J, Patton, John F
Format: Article
Language:English
Subjects:
Adrenergic alpha-Agonists - blood
Adult
Aldosterone - blood
Angiotensin II - blood
Atrial Natriuretic Factor - blood
Biological and medical sciences
Blood Glucose - analysis
Blood Pressure - physiology
Dopamine - blood
Epinephrine - blood
Follow-Up Studies
Fundamental and applied biological sciences. Psychology
Hormones - blood
Humans
Hydrocortisone - blood
Lactic Acid - blood
Male
Norepinephrine - blood
Osmolar Concentration
Physical Endurance - physiology
Renin - blood
Stress, Physiological - blood
Stress, Physiological - physiopathology
Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports
Water-Electrolyte Balance - physiology
Weight Lifting - physiology
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Summary:The purpose of this study was to investigate the acute responses of both stress and fluid regulatory hormones to a single bout of resistance exercise in both trained and untrained men. Seven competitive power lifters (PL) and 12 untrained subjects (UT) performed one set of the leg press exercise to exhaustion at 80% of their respective one-repetition maximum. Blood samples were obtained twice prior to exercise (at P1 and P2), immediately postexercise (IP), and at 5 minutes postexercise (5PE). Compared to P1 and P2, plasma epinephrine, norepinephrine, dopamine, atrial peptide, osmolality, and blood lactic acid increased significantly (p 
ISSN:1066-7814
1543-2718
DOI:10.1139/h99-034