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Sympathoadrenergic mechanisms in reduced hemodynamic stress responses after exercise.

Publication ,  Journal Article
Brownley, KA; Hinderliter, AL; West, SG; Girdler, SS; Sherwood, A; Light, KC
Published in: Med Sci Sports Exerc
June 2003

PURPOSE: This study examines the acute effects of moderate aerobic exercise on 1) hemodynamic and sympathetic activity during behavioral stress and 2) beta-adrenergic receptor responsivity in a biracial sample of 24 sedentary adults. METHODS: Before and after exercise, blood pressure (BP), impedance-derived cardiovascular measures, and plasma norepinephrine (NE) and epinephrine (EPI) were assessed during mental arithmetic and active speech tasks, and beta-adrenergic receptor responsivity was assessed using a standard isoproterenol challenge procedure. RESULTS: After exercise, BP, NE, and EPI responses to stress were reduced (0.0001 < P < 0.08), preejection period (PEP) was elongated (P < 0.0001), and beta(1)- and beta(2)-receptor responsivity (P < 0.02) was enhanced. Approximately 65% of the prepost exercise mean arterial pressure response difference could be accounted for by changes in sympathetic factors, with change in NE and PEP being the single best predictors. CONCLUSIONS: Reduced BP responses to stress after acute exercise are strongly linked to a decrease in sympathetic drive, as evidenced by reduced NE responses and elongation of the PEP. Coincident with this overall dampening of the hemodynamic response to stress, increases in cardiac and vascular beta-adrenergic receptor responsivity occur. These findings may have important implications for future translational studies that seek to articulate the mechanisms through which regular aerobic exercise reduces the risks of hypertensive and coronary heart disease.

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Published In

Med Sci Sports Exerc

DOI

ISSN

0195-9131

Publication Date

June 2003

Volume

35

Issue

6

Start / End Page

978 / 986

Location

United States

Related Subject Headings

  • Sympathetic Nervous System
  • Stress, Psychological
  • Sport Sciences
  • Receptors, Adrenergic, beta
  • Norepinephrine
  • Male
  • Hypertension
  • Humans
  • Female
  • Exercise
 

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Brownley, K. A., Hinderliter, A. L., West, S. G., Girdler, S. S., Sherwood, A., & Light, K. C. (2003). Sympathoadrenergic mechanisms in reduced hemodynamic stress responses after exercise. Med Sci Sports Exerc, 35(6), 978–986. https://doi.org/10.1249/01.MSS.0000069335.12756.1B
Brownley, Kimberly A., Alan L. Hinderliter, Sheila G. West, Susan S. Girdler, Andrew Sherwood, and Kathleen C. Light. “Sympathoadrenergic mechanisms in reduced hemodynamic stress responses after exercise.Med Sci Sports Exerc 35, no. 6 (June 2003): 978–86. https://doi.org/10.1249/01.MSS.0000069335.12756.1B.
Brownley KA, Hinderliter AL, West SG, Girdler SS, Sherwood A, Light KC. Sympathoadrenergic mechanisms in reduced hemodynamic stress responses after exercise. Med Sci Sports Exerc. 2003 Jun;35(6):978–86.
Brownley, Kimberly A., et al. “Sympathoadrenergic mechanisms in reduced hemodynamic stress responses after exercise.Med Sci Sports Exerc, vol. 35, no. 6, June 2003, pp. 978–86. Pubmed, doi:10.1249/01.MSS.0000069335.12756.1B.
Brownley KA, Hinderliter AL, West SG, Girdler SS, Sherwood A, Light KC. Sympathoadrenergic mechanisms in reduced hemodynamic stress responses after exercise. Med Sci Sports Exerc. 2003 Jun;35(6):978–986.

Published In

Med Sci Sports Exerc

DOI

ISSN

0195-9131

Publication Date

June 2003

Volume

35

Issue

6

Start / End Page

978 / 986

Location

United States

Related Subject Headings

  • Sympathetic Nervous System
  • Stress, Psychological
  • Sport Sciences
  • Receptors, Adrenergic, beta
  • Norepinephrine
  • Male
  • Hypertension
  • Humans
  • Female
  • Exercise