title: Acute hormonal responses to a single bout of heavy resistance exercise in trained power lifters and untrained men.
abstract: 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 < or = 0.05) at IP. Plasma epinephrine, norepinephrine, atrial peptide, and blood lactic acid concentrations remained elevated at 5PE compared to P1 and P2. Plasma renin activity and angiotensin II were significantly elevated at 5PE compared to P1, P2, and IP, and this increase was significantly greater in PL compared to UT at 5PE. These data indicate that an acute bout of resistance exercise dramatically affects secretion of stress and fluid regulatory hormones.
authors.affiliation: Human Performance Laboratory, Ball State University, Muncie, IN 47306, USA.
authors.forename: W J
authors.initials: WJ
authors.lastname: Kraemer
authors.forename: S J
authors.initials: SJ
authors.lastname: Fleck
authors.forename: C M
authors.initials: CM
authors.lastname: Maresh
authors.forename: N A
authors.initials: NA
authors.lastname: Ratamess
authors.forename: S E
authors.initials: SE
authors.lastname: Gordon
authors.forename: K L
authors.initials: KL
authors.lastname: Goetz
authors.forename: E A
authors.initials: EA
authors.lastname: Harman
authors.forename: P N
authors.initials: PN
authors.lastname: Frykman
authors.forename: J S
authors.initials: JS
authors.lastname: Volek
authors.forename: S A
authors.initials: SA
authors.lastname: Mazzetti
authors.forename: A C
authors.initials: AC
authors.lastname: Fry
authors.forename: L J
authors.initials: LJ
authors.lastname: Marchitelli
authors.forename: J F
authors.initials: JF
authors.lastname: Patton
mesh_terms: D000316:Adrenergic alpha-Agonists / Q000097:blood; D000328:Adult; D000450:Aldosterone / Q000097:blood; D000804:Angiotensin II / Q000097:blood; D009320:Atrial Natriuretic Factor / Q000097:blood; D001786:Blood Glucose / Q000032:analysis; D001794:Blood Pressure / Q000502:physiology; D004298:Dopamine / Q000097:blood; D004837:Epinephrine / Q000097:blood; D005500:Follow-Up Studies; D006728:Hormones / Q000097:blood*; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D019344:Lactic Acid / Q000097:blood; D008297:Male; D009638:Norepinephrine / Q000097:blood; D009994:Osmolar Concentration; D010807:Physical Endurance / Q000502:physiology; D012083:Renin / Q000097:blood; D013312:Stress, Physiological / Q000097:blood / Q000503:physiopathology; D014882:Water-Electrolyte Balance / Q000502:physiology; D014891:Weight Lifting / Q000502:physiology*
chemical_list: D000316:Adrenergic alpha-Agonists; D001786:Blood Glucose; D006728:Hormones; D000804:Angiotensin II; D019344:Lactic Acid; D000450:Aldosterone; D009320:Atrial Natriuretic Factor; D012083:Renin; D004298:Dopamine; D006854:Hydrocortisone; D009638:Norepinephrine; D004837:Epinephrine