Document Detail

Left ventricular response to submaximal exercise in endurance-trained athletes and sedentary adults.
MedLine Citation:
PMID:  1529949     Owner:  NLM     Status:  MEDLINE    
This investigation examines the hypothesis that athletes increase stroke volume with submaximal exercise through an augmentation of left ventricular (LV) end-diastolic volume and a reduction of LV end-systolic volume, whereas sedentary adults only increase stroke volume modestly, because LV end-diastolic volume does not increase. Upright bicycle exercise was performed by 17 endurance-trained male athletes and 15 sedentary men. M-mode echocardiograms were obtained during submaximal exercise at predetermined heart rates. Athletes, at a heart rate of 130 beats/min, increased their stroke volume 67% from 72 +/- 18 ml to 120 +/- 26 ml (p less than 0.001). This resulted from an increase of LV end-diastolic volume from 119 +/- 23 to 152 +/- 28 ml (p less than 0.001) and a reduction in LV end-systolic volume from 46 +/- 14 to 31 +/- 9 ml (p less than 0.001). Sedentary men at the same heart rate increased stroke volume 22% from 63 +/- 15 to 77 +/- 21 ml (p less than 0.05). LV end-diastolic volume did not change (96 +/- 20 vs 97 +/- 28 ml) (p = not significant), but LV end-systolic volume decreased (33 +/- 11 vs 20 +/- 9 ml) (p less than 0.001). In conclusion, athletes increased cardiac output through a more prominent augmentation of stroke volume than sedentary subjects at submaximal exercise. This was accomplished through an augmentation of LV end-diastolic volume. This may have a conserving effect on myocardial oxygen consumption at these levels of exercise.
J R Schairer; P D Stein; S Keteyian; F Fedel; J Ehrman; M Alam; J W Henry; T Shaw
Related Documents :
22497979 - Multidisciplinary lifestyle intervention in the obese: its impact on patients' percepti...
16283369 - Adaptation of left ventricular morphology to long-term training in sprint- and enduranc...
22658589 - Kinetic chain influences on upper and lower trapezius muscle activation during eight va...
21549819 - Cordyceps sinensis promotes exercise endurance capacity of rats by activating skeletal ...
18076659 - Left ventricular end-diastolic geometrical adjustments during exercise in endurance ath...
3732309 - A comparison of radionuclide methods of evaluating aortic regurgitation with observatio...
12451009 - Abnormal postexercise cardiovascular recovery and its determinants in patients after ri...
9719759 - Selected blood parameters during recovery from strenuous running exertion in trotters.
16543649 - Role of exercise training on pulpal blood flow in diabetic rats.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  70     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1992 Oct 
Date Detail:
Created Date:  1992-10-22     Completed Date:  1992-10-22     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  930-3     Citation Subset:  AIM; IM    
Henry Ford Heart and Vascular Institute, Detroit, Michigan 48202.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Cardiac Output
Cardiac Volume
Heart Rate
Physical Endurance*
Stroke Volume
Ventricular Function, Left*

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

Previous Document:  Transesophageal echocardiographic diagnosis of right-sided cardiac masses in patients with central l...
Next Document:  Prognostic value of echocardiography in hospitalized patients with pericardial effusion.