Document Detail

The effect of acute hypoxia at low altitude and acute normoxia at high altitude on performance during a 30-s Wingate test in children.
MedLine Citation:
PMID:  8002119     Owner:  NLM     Status:  MEDLINE    
The effect of acute hypoxia (FIO2 = 0.137 +/- 0.001) at Low Altitude (LA: Clermont-Ferrand, 330 m) and acute normoxia (FIO2 = 0.306 +/- 0.006) at High Altitude (HA: La Paz, 3600 m) on performance during a 30-s Wingate test has been investigated in prepubertal children (Tanner stage 1). Twenty five boys (LA, n = 10; HA, n = 15) aged from 10.6 to 12.7 years performed two Wingate tests at random: at LA, one in normoxia (ambient air) and one in acute hypoxia and at HA, one in chronic hypoxia (ambient air) and one in acute normoxia. The subjects performed the two tests using the same calibrated cycle ergometer. Peak Power (PP), Mean Power (MP), O2 uptake during the 30 s (VO2) and blood lactate accumulation (delta [L]s) were measured. Compared to normoxia, acute hypoxia at LA did not alter PP (8.0 +/- 1.1 vs 7.9 +/- 1.3 BW) and MP (6.1 +/- 0.7 vs 6.1 +/- 1.1 BW). Similarly, compared to chronic hypoxia, acute normoxia at HA did not modify these parameters (PP: 7.4 +/- 1.5 vs 7.3 +/- 1.8; MP: 5.4 +/- 1.2 vs 5.5 +/- 1.1; BW). VO2 and delta [L]s were neither significantly changed by acute hypoxia at LA (520 +/- 50 vs 550 +/- 60 ml O2; 5.3 +/- 1.7 vs 4.8 +/- 1.7 mmol.l-1) nor by acute normoxia at HA (530 +/- 110 vs 500 +/- 90 ml O2; 3.4 +/- 1.3 vs 3.3 +/- 1.0 mmol.l-1).(ABSTRACT TRUNCATED AT 250 WORDS)
S Blonc; G Falgairette; M Bedu; N Fellmann; H Spielvogel; J Coudert
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  International journal of sports medicine     Volume:  15     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  1994 Oct 
Date Detail:
Created Date:  1995-01-26     Completed Date:  1995-01-26     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  403-7     Citation Subset:  IM; S    
Laboratoire de Physiologie de la performance motrice, UFR STAPS, Aubiere, France.
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MeSH Terms
Acute Disease
Anoxia / blood,  physiopathology*
Carbon Dioxide / analysis
Chronic Disease
Exercise Test
Lactates / blood
Muscle Contraction / physiology
Oxygen / analysis,  blood*
Oxygen Consumption / physiology
Physical Exertion / physiology*
Psychomotor Performance / physiology*
Reg. No./Substance:
0/Lactates; 124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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

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