Document Detail


Anticipating maximal or submaximal exercise: no differences in cardiopulmonary responses.
MedLine Citation:
PMID:  20618359     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Anticipation before the start of exercise may influence the cardiopulmonary responses during exercise. If anticipation influences the responses differently with maximal and submaximal exercises, normative values for submaximal responses will not be comparable unless exercise has been continued to the same end point.
METHODS: Twelve healthy subjects (five men) aged 18-27 years had a maximal exercise test and a submaximal exercise test on a cycle ergometer on different days and in random order. They were not aware of the specific purpose of the study and were informed 15 min before the tests whether it should be maximal or submaximal. Workload increased with 15 W min(-1) until exhaustion or to 80% of predicted maximal heart rate (HR). HR, oxygen uptake (VO(2)), carbon dioxide production (VCO(2)), minute ventilation (V(E)) and tidal volume (V(T)) were averaged over 20 s intervals. Linear regression of the HR-VO(2) relationship and quadratic regression of the V(T)-V(E) relationship were performed for each individual, and the regression coefficients for maximal and submaximal tests were compared.
RESULTS: The regression models described the V(T)-V(E) responses with a R(2) > 0.85 in 23 of 24 tests, and the HR-VO(2) responses with a R(2) > 0.90 in all tests. The regression coefficients of the relationships were not significantly different with maximal and submaximal exercises.
CONCLUSION: Anticipation appears not to influence the responses to progressive maximal and submaximal exercise tests with the same rate of increase in load. Normative values at submaximal exercise levels are not influenced by the targeted end point of exercise.
Authors:
Ida Kjelkenes; Einar Thorsen
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't     Date:  2010-07-02
Journal Detail:
Title:  Clinical physiology and functional imaging     Volume:  30     ISSN:  1475-097X     ISO Abbreviation:  Clin Physiol Funct Imaging     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-10     Completed Date:  2010-12-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101137604     Medline TA:  Clin Physiol Funct Imaging     Country:  England    
Other Details:
Languages:  eng     Pagination:  333-7     Citation Subset:  IM    
Affiliation:
Institute of Medicine, University of Bergen, Bergen, Norway.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Anticipation, Psychological*
Exercise / psychology*
Exercise Test
Female
Heart / physiology*
Heart Rate
Humans
Linear Models
Lung / physiology*
Male
Norway
Oxygen Consumption
Pulmonary Ventilation
Tidal Volume
Time Factors
Young Adult

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


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