Document Detail

Effects of age and counseling on the cardiorespiratory response to graded exercise.
MedLine Citation:
PMID:  19927033     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To report on the normative cardiorespiratory response to a graded exercise test in a group of healthy males, 30-69 yr of age (n = 816), and to test the effect of health and fitness counseling on cardiorespiratory fitness in a subset of healthy subjects (n = 87, mean follow-up = 7.3 yr) who returned for at least five subsequent visits. METHODS: As part of a preventive medicine service, each subject performed an incremental exercise test to exhaustion on a treadmill. Peak oxygen consumption, ventilatory threshold, HRmax, and peak oxygen pulse were the primary dependent measures recorded from each test. RESULTS: Both analyses (cross-sectional data followed by longitudinal data) showed a significant decline in peak oxygen consumption with age (0.03 and 0.04 L x min(-1) x yr(-1)), which was related to an age-associated decline in HRmax (0.97 and 0.81 beats per year) and peak oxygen pulse (0.13 and 0.08 mL per beat per year). Ventilatory threshold was also influenced by age, declining in both the cross-sectional (0.02 L x min(-1) x yr(-1)) and the longitudinal (0.03 L x min(-1) x yr(-1)) comparisons. However, when ventilatory threshold and peak oxygen pulse were analyzed for changes between the initial and the follow-up (7.3 yr) visits, no difference was found. It remains unclear if this finding can be attributed to the intervention used. CONCLUSION: Our data support previous investigations on the effects of age on cardiorespiratory fitness. More work is needed to define the potential longitudinal benefits of interventions like those administered in the present study.
Michael D Nelson; Stewart R Petersen; Ronald A Dlin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  42     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-01-20     Completed Date:  2010-04-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  255-64     Citation Subset:  IM; S    
Physical Education and Recreation, University of Alberta, Edmonton, Alberta, Canada.
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MeSH Terms
Age Factors
Cross-Sectional Studies
Exercise / physiology*
Exercise Test / methods
Middle Aged
Oxygen Consumption / physiology
Physical Fitness / physiology*
Preventive Medicine

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

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