Document Detail

The Larger Exercise Stroke Volume in Endurance Trained Men Does Not Result From Increased Left Ventricular Early or Late Inflow or Tissue Velocities.
MedLine Citation:
PMID:  22409154     Owner:  NLM     Status:  Publisher    
AIM: To determine whether the larger exercise stroke volume in senior endurance trained athletes results from an attenuation of age-related alterations in left ventricular (LV) early diastolic filling or a more vigorous late filling. METHODS: Body composition (DEXA), VO(2) peak, stroke volume (CO(2) rebreathing) and Doppler measures of early and late mitral inflow and mitral annular velocities were collected at seated upright rest and heart rate matched exercise (100 & 120 bpm) in trained and untrained younger (18-30 years) men and trained and untrained older (60-80 years) healthy men. RESULTS: Aging had a greater effect than training status on seated rest mitral inflow and tissue Doppler imaging (TDI) parameters, as shown by a lower peak early-to-late mitral inflow velocity ratio (E/A ratio) and slower peak early mitral annular velocity (Em) in older compared to younger men. Exercise stroke volume was unaffected by healthy aging, however, Em, an index of early LV lengthening rate and relaxation was slower (p<0.001), while measures of atrial systole were increased (p<0.001) during exercise in older men. Stroke volume during exercise was larger in the trained men (p<0.001), however, early and late mitral inflow and tissue velocities were not different between trained and untrained men. CONCLUSION: The larger exercise stroke volume in trained older male athletes does not seem to be related to faster filling or lengthening velocities during early or late filling. Thus, a larger, more compliant left ventricle in combination with an increased blood volume may explain the larger LV filling volumes in trained seniors. © 2012 The Authors Acta Physiologica © 2012 Scandinavian Physiological Society.
Graeme Carrick-Ranson; Robert N Doughty; Gillian A Whalley; Helen J Walsh; Greg D Gamble; James C Baldi
Related Documents :
23304194 - Systematic review of chinese traditional exercise baduanjin modulating the blood lipid ...
9710864 - Injury rates from walking, gardening, weightlifting, outdoor bicycling, and aerobics.
11833024 - Effect of strenuous arm crank exercise on platelet function in patients with spinal cor...
25020324 - P601cardio-protective effects of exercise are abolished in pressure-overload following ...
7941674 - Vo2 and cardiac output during rest-exercise and exercise-exercise transients.
9688624 - Tricarboxylic acid cycle intermediate pool size and estimated cycle flux in human muscl...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-12
Journal Detail:
Title:  Acta physiologica (Oxford, England)     Volume:  -     ISSN:  1748-1716     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101262545     Medline TA:  Acta Physiol (Oxf)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 The Authors Acta Physiologica © 2012 Scandinavian Physiological Society.
Cardiovascular Research Group, Department of Medicine, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand; Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas & the University of Texas Southwestern Medical Center at Dallas, Texas.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

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

Previous Document:  Cleaning potential of glycine air-flow application in an in vitro peri-implantitis model.
Next Document:  Structure Dependence of Charged States in "Linear" Polyaniline as Studied by In Situ ATR-FTIR Spectr...