NDLI: Determinants of maximal oxygen uptake in moderate acute hypoxia in endurance athletes

Content Provider	Springer Nature Link
Author	Mollard, Pascal Woorons, Xavier Letournel, Muriel Lamberto, Christine Favret, Fabrice Pichon, Aurélien Beaudry, Michèle Richalet, Jean Paul
Copyright Year	2007
Abstract	The factors determining maximal oxygen consumption were explored in eight endurance trained subjects (TS) and eight untrained subjects (US) exposed to moderate acute normobaric hypoxia. Subjects performed maximal incremental tests at sea level and simulated altitudes (1,000, 2,500, 4,500 m). Heart rate (HR), stroke volume (SV), cardiac output $${(\dot{{Q}})},$$ arterialized oxygen saturation $${(\hbox{Sa}^{\prime}\hbox{O}_2)},$$ oxygen uptake $${(\dot{{V}}\hbox{O}_{\rm 2max})},$$ ventilation ( $${\dot{{V}}{E}},$$ expressed in normobaric conditions) were measured. At maximal exercise, ventilatory equivalent $${(\dot{{V}}{E}/\dot{{V}}\hbox{O}_{\rm 2max}),\, \hbox{O}_2}$$ transport $${(\dot{{Q}}\hbox{aO}_{\rm 2max})}$$ and O2 extraction (O2ERmax) were calculated. In TS, $${\dot{{Q}}_{\rm max}}$$ remained unchanged despite a significant reduction in $${\hbox{HR}_{\rm max}}$$ at 4,500 m. SVmax remained unchanged. $${\dot{{V}}{E}_{\rm max}}$$ decreased in TS at 4,500 m, $${\dot{{V}}{E}/\dot{{V}}\hbox{O}_{\rm 2max}}$$ was lower in TS and greater at 4,500 m vs. sea level in both groups. Sa′O2max decreased at and above 1,000 m in TS and 2,500 m in US, O2ERmax increased at 4,500 m in both groups. $${\dot{{Q}}\hbox{aO}_{\rm 2max}}$$ decreased with altitude and was greater in TS than US up to 2,500 m but not at 4,500 m. $${\dot{{V}}\hbox{O}_{\rm 2max}}$$ decreased with altitude but the decrement $${(\Delta \dot{{V}}\hbox{O}_{\rm 2max})}$$ was larger in TS at 4,500 m. In both groups $${\Delta \dot{{V}}\hbox{O}_{\rm 2max}}$$ in moderate hypoxia was correlated with $${\Delta \dot{{Q}}\hbox{aO}_{\rm 2max}}.$$ Several differences between the two groups are probably responsible for the greater $${\Delta \dot{{V}}\hbox{O}_{\rm 2max}}$$ in TS at 4,500 m : (1) the relative hypoventilation in TS as shown by the decrement in $${\dot{{V}}{E}_{\rm max}}$$ at 4,500 m (2) the greater $${\dot{{Q}}\hbox{aO}_{\rm 2max}}$$ decrement in TS due to a lower Sa′O2max and unchanged $${\dot{{Q}}_{\rm max}}$$ 3) the smaller increase in O2ERmax in TS, insufficient to compensate the decrease in $${\dot{{Q}}a\hbox{O}_{\rm 2max}}.$$
Starting Page	663
Ending Page	673
Page Count	11
File Format	PDF
ISSN	14396319
Journal	European Journal of Applied Physiology
Volume Number	100
Issue Number	6
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-05-30
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aerobic performance Cardiac output Arterial O2 saturation Venous O2 saturation Tissue O2 extraction Sports Medicine Occupational Medicine/Industrial Medicine Human Physiology
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Public Health, Environmental and Occupational Health Sports Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Effect of hyperoxia on maximal O2 uptake in exercise-induced arterial hypoxaemic subjects

Linear decrease in $$\dot V\hbox{O}_{2\max}$$ and performance with increasing altitude in endurance athletes

Effect of intermittent hypoxia on oxygen uptake during submaximal exercise in endurance athletes

Hypoxia and CO alter O2 extraction but not peripheral diffusing capacity during maximal aerobic exercise

Effects of acute moderate hypoxia on anaerobic capacity in endurance-trained runners

Endurance exercise performance in acute hypoxia is influenced by expiratory flow limitation

Living high-training low: tolerance and acclimatization in elite endurance athletes

Improvement of $$\dot{V}\hbox{O}_{2 \max},$$ by cardiac output and oxygen extraction adaptation during intermittent versus continuous endurance training

Influence of “living high–training low” on aerobic performance and economy of work in elite athletes

Determinants of maximal oxygen uptake in moderate acute hypoxia in endurance athletes

Similar Documents

Effect of hyperoxia on maximal O2 uptake in exercise-induced arterial hypoxaemic subjects

Linear decrease in $$\dot V\hbox{O}_{2\max}$$ and performance with increasing altitude in endurance athletes

Effect of intermittent hypoxia on oxygen uptake during submaximal exercise in endurance athletes

Hypoxia and CO alter O2 extraction but not peripheral diffusing capacity during maximal aerobic exercise

Effects of acute moderate hypoxia on anaerobic capacity in endurance-trained runners

Endurance exercise performance in acute hypoxia is influenced by expiratory flow limitation

Living high-training low: tolerance and acclimatization in elite endurance athletes

Improvement of $$\dot{V}\hbox{O}_{2 \max},$$ by cardiac output and oxygen extraction adaptation during intermittent versus continuous endurance training

Influence of “living high–training low” on aerobic performance and economy of work in elite athletes

Determinants of maximal oxygen uptake in moderate acute hypoxia in endurance athletes