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    
Abstract/OtherAbstract:
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 W.kg-1 BW) and MP (6.1 +/- 0.7 vs 6.1 +/- 1.1 W.kg-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; W.kg-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)
Authors:
S Blonc; G Falgairette; M Bedu; N Fellmann; H Spielvogel; J Coudert
Related Documents :
3140329 - Metabolic and ventilatory rates in newborn kittens during acute hypoxia.
3697829 - Heart rate and respiratory patterns in mild hypoxia in unanaesthetized newborn mammals.
19070359 - Hydromorphological mechanisms leading to hypoxia off the changjiang estuary.
12750069 - Dobutamine potentiates arterial chemoreflex sensitivity in healthy normal humans.
2810379 - Effect of respiratory acidosis on hypoxic newborn myocardium.
8847299 - Effect of dichloroacetate on paco2 responses to hypoxia in awake goats.
7641329 - Optical transmembrane potential measurements during defibrillation-strength shocks in p...
19826299 - Biochemical evaluation of running workouts used in training for the 400-m sprint.
19935849 - Heart rate variability and nonlinear analysis of heart rate dynamics following single a...
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    
Affiliation:
Laboratoire de Physiologie de la performance motrice, UFR STAPS, Aubiere, France.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Acute Disease
Altitude*
Anoxia / blood,  physiopathology*
Bolivia
Carbon Dioxide / analysis
Child
Chronic Disease
Exercise Test
France
Humans
Lactates / blood
Male
Muscle Contraction / physiology
Oxygen / analysis,  blood*
Oxygen Consumption / physiology
Physical Exertion / physiology*
Psychomotor Performance / physiology*
Puberty
Spirometry
Chemical
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


Previous Document:  Sickle cell trait as a limiting factor for high-level performance in a semi-marathon.
Next Document:  Lipolytic and cardiac responses to various forms of stress in humans.