Document Detail


Effect of arterial carbon dioxide on ventilation during recovery from impulse exercises of various intensities.
MedLine Citation:
PMID:  22982713     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
To determine that whether arterial carbon dioxide (PaCO2) affects ventilation ($\dot V$E) during recovery from impulse-like exercises of various intensities, subjects performed four impulse-like tests with different workloads. Each test consisted of a 20-sec impulse-like exercise at 80 rpm and 60-min recovery. Blood samples were collected at rest and during recovery to measure blood ions and gases. $\dot V$E was measured continuously during rest, exercise and recovery periods. A significant curvilinear relationship was observed between $\dot V$E and pH during recovery from the 300- and 400-watt tests in all subjects. $\dot V$E was elevated during recovery from the 100-watt test despite no change in any of the humoral factors. Arterialized carbon dioxide (PaCO2) kinetics showed fluctuation, being increased at 1 min and decreased at 5 min during recovery, and this fluctuation was more enhanced with increase in exercise intensity. There was a significant relationship between $\dot V$E and PaCO2 during recovery from the 300- and 400-watt tests in all subjects. The results of the present study demonstrate that pH and neural factors drive $\dot V$E during recovery from impulse-like exercise and that fluctuation in PaCO2 controls $\dot V$E as a feedback loop and this feedback function is more enhanced as the work intensity increases.
Authors:
R Afroundeh; T Arimitsu; R Yamanaka; C S Lian; T Yunoki; Tokuo Yano
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta physiologica Hungarica     Volume:  99     ISSN:  0231-424X     ISO Abbreviation:  Acta Physiol Hung     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-09-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8309201     Medline TA:  Acta Physiol Hung     Country:  Hungary    
Other Details:
Languages:  eng     Pagination:  251-60     Citation Subset:  IM    
Affiliation:
Hokkaido University Graduate School of Education Sapporo Japan.
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