Document Detail

Change in double product during stepwise incremental exercise.
MedLine Citation:
PMID:  12808227     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to observe the change in double product with increases in the intensity of bicycle exercise. Eleven young male adults participated in this study. The subjects performed graded bicycling exercise increasing 20 watts every 2 min from 0 watts until the heart rate (HR) reached 170 beats.min(-1). During exercise systolic blood pressure (SBP) and HR were continuously measured. Initially SBP gradually increased with the increase in workload, but when the intensity of exercise became even higher, the rate of increase slowed. On the other hand, the increase in HR was very small during the initial 5 min of exercise and when the intensity of exercise increased, the rate of increase of HR became higher. The polygonal regression analyses on the relation of double product to elapsed time revealed clear break-points. On average, the break-point of double product was 6.6 min (56 watts). These results clearly showed that the break-point of double product with an increase in workload appeared even though the workload was relatively low.
Kyu Tae Kim; Seung Wook Choi; Kazufumi Takahashi; Takashi Kurokawa; Masahiro Yamasaki
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of physiological anthropology and applied human science     Volume:  22     ISSN:  1345-3475     ISO Abbreviation:  J Physiol Anthropol Appl Human Sci     Publication Date:  2003 May 
Date Detail:
Created Date:  2003-06-16     Completed Date:  2003-08-08     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  100930389     Medline TA:  J Physiol Anthropol Appl Human Sci     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  143-7     Citation Subset:  IM    
Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan.
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MeSH Terms
Bicycling / physiology*
Blood Pressure*
Exercise / physiology*
Heart Rate*
Reference Values

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

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