Document Detail


Oxygen saturation response to exercise VO2 at 2100 m and 4350 m in women mountaineering trainees.
MedLine Citation:
PMID:  12708123     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Human work performances decreases at high altitude (HA). This decrement does not appear to be similar for every individual, may be due to variety of factors like elevation, mode of induction, work intensity, physical condition and specificity of the subjects. The purpose of the study was to evaluate the effects of alteration in responses of oxygen saturation (SaO2) and oxygen consumption (VO2) to a standard exercise in women mountaineering trainees under hypobaric hypoxia. Experiments were conducted in 2 groups (10 each) of females and compared the difference in responses of native women of moderate altitude with those of the plains/low altitude. A standard exercise test (Modified Harvard Step-Test for women) was performed on a 30 cm stool with 24 cycles/min for 5 min, initially at 2100 m and then at 4350 m. The exercise VO2 values for plains dwelling women achieved apparently VO2max level at both altitude locations with significant reduction in SaO2 during standard exercise. Exercise VO2 values decreased on exposure to 4350 m with further reduction in SaO2. Whereas with same work intensity, under same situation the exercise VO2 values of the moderate altitude women did not appear to have reached VO2max. They also maintained comparatively higher level of SaO2. It may be concluded that hypoxic exposure along with mountaineering training, the moderate altitude women maintained a higher level of SaO2 during standard exercise at both altitude locations, compared to low altitude women who might have lost a compensatory reserve to defend the hypoxic stress to exercise. Thus, moderate altitude women are proved to be better fit for hypoxic tolerance/HA performance.
Authors:
G Bhaumik; S S Purkayastha; W Selvamurthy; P K Banerjee
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Indian journal of physiology and pharmacology     Volume:  47     ISSN:  0019-5499     ISO Abbreviation:  Indian J. Physiol. Pharmacol.     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2003-04-23     Completed Date:  2003-10-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0374707     Medline TA:  Indian J Physiol Pharmacol     Country:  India    
Other Details:
Languages:  eng     Pagination:  43-51     Citation Subset:  IM    
Affiliation:
Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, Delhi-110 054.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Altitude*
Analysis of Variance
Exercise / physiology*
Female
Heart Rate / physiology
Humans
Mountaineering / physiology*
Oxygen Consumption / physiology*
Pulmonary Ventilation / physiology*

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


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