Document Detail


Postexercise hypotension in an endurance-trained population of men and women following high-intensity interval and steady-state cycling.
MedLine Citation:
PMID:  20057359     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: The acute effect of high-intensity interval exercise (HI) on blood pressure (BP) is unknown although this type of exercise has similar or greater cardiovascular benefits compared to steady-state aerobic exercise (SS). This study examined postexercise hypotension (PEH) and potential mechanisms of this response in endurance-trained subjects following acute SS and HI. Sex differences were also evaluated.
METHODS: A total of 25 endurance-trained men (n = 15) and women (n = 10) performed a bout of HI and a bout of SS cycling in randomized order on separate days. Before exercise, 30 min postexercise, and 60 min postexercise, we measured brachial and aortic BP. Cardiac output (CO), stroke volume (SV), end diastolic volume (EDV), end systolic volume (ESV), and left ventricular wall-velocities were measured using ultrasonography with tissue Doppler capabilities. Ejection fraction and fractional shortening (FS), total peripheral resistance (TPR), and calf vascular resistance were calculated from the above variables and measures of leg blood flow.
RESULTS: BP, ejection fraction, and FS decreased by a similar magnitude following both bouts but changes in CO, heart rate (HR), TPR, and calf vascular resistance were greater in magnitude following HI than following SS. Men and women responded similarly to HI. Although men and women exhibited a similar PEH following SS, they showed differential changes in SV, EDV, and TPR.
CONCLUSIONS: HI acutely reduces BP similarly to SS. The mechanistic response to HI appears to differ from that of SS, and endurance-trained men and women may exhibit differential mechanisms for PEH following SS but not HI.
Authors:
Lindy Rossow; Huimin Yan; Christopher A Fahs; Sushant M Ranadive; Stamatis Agiovlasitis; Kenneth R Wilund; Tracy Baynard; Bo Fernhall
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2010-01-07
Journal Detail:
Title:  American journal of hypertension     Volume:  23     ISSN:  1941-7225     ISO Abbreviation:  Am. J. Hypertens.     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-03-19     Completed Date:  2010-06-04     Revised Date:  2011-06-30    
Medline Journal Info:
Nlm Unique ID:  8803676     Medline TA:  Am J Hypertens     Country:  United States    
Other Details:
Languages:  eng     Pagination:  358-67     Citation Subset:  IM    
Affiliation:
Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, Illinois, USA. lindy.rossow@ou.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Bicycling
Blood Flow Velocity
Cardiac Output
Exercise / physiology*
Exercise Test
Exercise Therapy
Female
Heart Ventricles / ultrasonography
Humans
Hypertension / therapy
Hypotension / etiology*,  physiopathology
Male
Physical Endurance / physiology*
Sex Factors
Vascular Resistance
Young Adult
Comments/Corrections
Comment In:
Am J Hypertens. 2010 Aug;23(8):812; author reply 813   [PMID:  20644524 ]

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


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