Document Detail


Human cardiovascular and humoral responses to moderate muscle activation during dynamic exercise.
MedLine Citation:
PMID:  10642393     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We examined the hypothesis that activation of the muscle metaboreflex during dynamic exercise would augment influences tending to cause a rise in arginine vasopressin, plasma renin activity, and catecholamines during dynamic exercise in humans. Ten healthy adults performed 30 min of supine cycle ergometer exercise at approximately 50% of peak oxygen consumption with or without moderate muscle metaboreflex activation by application of 35 mmHg lower body positive pressure (LBPP). Application of LBPP during the first 15 or last 15 min of exercise increased mean arterial blood pressure, plasma lactate concentration, and minute ventilation, indicating an activation of the muscle metaboreflex. These changes were rapidly reversed when LBPP was removed. During exercise at this intensity, LBPP augmented the release of arginine vasopressin and catecholamines but not of plasma renin activity. These results suggest that, although in humans hormonal responses are induced by moderate activation of the muscle metaboreflex during dynamic exercise, the thresholds for these responses may not be uniform among the various glands and hormones.
Authors:
T Nishiyasu; K Nagashima; E R Nadel; G W Mack
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Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  88     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2000 Jan 
Date Detail:
Created Date:  2000-03-28     Completed Date:  2000-03-28     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  300-7     Citation Subset:  IM; S    
Affiliation:
Department of Exercise Physiology, Institute of Health and Sport Sciences University of Tsukuba, Tsukuba City 305-8574, Japan. nisiyasu@taiiku.tsukuba.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Adult
Arginine Vasopressin / blood
Body Temperature
Cardiovascular Physiological Phenomena*
Catecholamines / blood
Cross-Over Studies
Esophagus / physiology
Exercise / physiology*
Female
Hemodynamics
Humans
Lactic Acid / blood
Male
Muscle, Skeletal / physiology*
Oxygen Consumption
Pressure
Pulmonary Gas Exchange
Pulmonary Ventilation / physiology
Reflex / physiology*
Renin / blood
Supine Position
Grant Support
ID/Acronym/Agency:
HL20634/HL/NHLBI NIH HHS; HL39818/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
0/Catecholamines; 113-79-1/Arginine Vasopressin; 50-21-5/Lactic Acid; EC 3.4.23.15/Renin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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