Document Detail

Pulmonary effects of submerged exercise while breathing 140 kPa oxygen.
MedLine Citation:
PMID:  19175197     Owner:  NLM     Status:  MEDLINE    
Pulmonary effects of prolonged mild intermittent underwater cycle ergometer exercise were assessed after single and repeated four-hour dives to 12 feet. With air, five daily dives (surface interval [SI], 20 hours), and with 100% oxygen, single dives, five daily dives, and afternoon-morning dives (SI, 15 hours) were conducted. Air divers had no symptoms or abnormal pulmonary function values but showed slight decreases within the normal range in forced expired volume in one second (FEV1; -0.45%/day) and forced expired flow between 25% and 75% of volume expired (FEF25-75; -0.8%/day). After one oxygen dive, incidences of mild symptoms or reduced pulmonary function were not different with exercise from those resting, but during five dives, decreases were significant in FEF25-75 (-1.8%/day) and diffusing capacity of the lung for carbon monoxide (D(L)CO; -1.2%/day), estimated to cause abnormal values in 25% of divers in nine to ten days. Following afternoon-morning dive pairs, changes in FEV1 and FEF25-75 were similar to those after nine or four daily dives, respectively. Exercise increases the injurious pulmonary effects of 140 kPa oxygen, and oxygen, those of exercise. A one-day break should follow two 4-hour exercise oxygen dives with surface intervals of 15 to 20 hours.
B E Shykoff
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Undersea & hyperbaric medicine : journal of the Undersea and Hyperbaric Medical Society, Inc     Volume:  35     ISSN:  1066-2936     ISO Abbreviation:  Undersea Hyperb Med     Publication Date:    2008 Nov-Dec
Date Detail:
Created Date:  2009-01-29     Completed Date:  2009-02-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9312954     Medline TA:  Undersea Hyperb Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  417-26     Citation Subset:  IM; S    
Navy Experimental Diving Unit, Panama City, FL, USA.
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MeSH Terms
Analysis of Variance
Diving / physiology*
Exercise / physiology*
Exercise Test
Forced Expiratory Flow Rates / physiology
Forced Expiratory Volume / physiology
Lung / physiopathology*
Middle Aged
Oxygen / administration & dosage*,  adverse effects
Partial Pressure
Time Factors
Vital Capacity / physiology
Reg. No./Substance:

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

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