Cited by 53Cardiovascular and exercise physiologyCardiovascular Effects of ExerciseExercise and Physiological Responses

The DOI matches its Crossref record.

Prolonged exercise alters beta-adrenergic responsiveness in healthy sedentary humans

Eysmann, S. B., Gervino, E., Vatner, D. E., Katz, S. E., Decker, L., Douglas, P. S.·1996·Journal of Applied Physiology

Abstract

To examine whether beta-adrenergic desensitization occurs after prolonged exercise, echocardiograms, heart rate responses to isoproterenol, plasma catecholamines, and circulating lymphocyte beta-adrenergic receptors were examined in 10 sedentary normal subjects at rest and after brief (10 min) and exhaustive (mean duration 95 min) cycle exercise. Resting end-diastolic volume and ejection fraction were significantly reduced after exercise (from 120 +/- 34 to 100 +/- 26 ml and from 60 +/- 0.4 to 54 +/- 0.6%, respectively; both P < 0.05). The amount of isoproterenol needed to increase heart rate 15 and 25 beats/min increased in a dose- (exercise duration) related fashion, and the increase in amount of isoproterenol needed after prolonged exercise was closely related to the decrease in ejection fraction (r2 = 0.67, P = 0.004). Circulating lymphocyte beta-receptor density and affinity, agonist binding, and adenylylcyclase levels were unchanged with prolonged exercise. In conclusion, prolonged exercise in sedentary normal subjects resulted in reduced cardiac chronotropic responsiveness to isoproterenol that was not reflected in peripheral lymphocyte beta-adrenergic-receptor downregulation.

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Crossref · 10.1152/jappl.1996.80.2.616

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Authors
Eysmann, S. B., Gervino, E., Vatner, D. E., Katz, S. E., Decker, L., & Douglas, P. S.
Affiliations
Beth Israel Deaconess Medical Center (US)
Venue
Journal of Applied Physiology
Published
1996-02-01
Volume
80
Issue
2
Pages
616-622
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
OpenAlex
W2355952088
Cited by
53
References
0
Citations by year
2025: 1 · 2023: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 2 · 2014: 1 · 2013: 3 · 2012: 1
FWCI
3.10
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (7r01hl037404-11, 5p01hl038070-07, 5r01hl045332-04)
  • National Heart, Lung, and Blood Institute (HL38070, HL-45332, HL37404)
Topics
  • Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Effects of Exercise
  • Health Sciences › Medicine › Physiology (medical) › Exercise and Physiological Responses
Keywords
beta-adrenergic receptor desensitization, prolonged exercise, sedentary subjects, isoproterenol, heart rate response, ejection fraction, end-diastolic volume, catecholamines, exercise duration
MeSH terms
Adenylyl Cyclases, Adrenergic beta-Agonists, Adult, Catecholamines, Exercise Test, Female, Humans, Injections, Intravenous, Iodine Radioisotopes, Isoproterenol, Lymphocytes, Male, Middle Aged, Myocardium, Radioligand Assay, Receptors, Adrenergic, beta, Echocardiography, Doppler, Exercise, Down-Regulation, Ventricular Function, Left

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