Oxygen

Exercise-induced quadriceps muscle fatigue in men and women: effects of arterial oxygen content and respiratory muscle work
KEY POINTS: High work of breathing and exercise-induced arterial hypoxaemia (EIAH) can decrease O2 delivery and exacerbate …
Paolo B. Dominelli, Yannick Molgat-Seon, Donald E. G. Griesdale, Carli M. Peters, Jean-Sébastien Blouin, Mypinder Sekhon, Giulio S. Dominelli, William R. Henderson, Glen E. Foster, Lee M. Romer, Michael S. Koehle, A. William Sheel
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The effects of graded changes in oxygen and carbon dioxide tension on coronary blood velocity independent of myocardial energy demand.
In humans, coronary blood flow is tightly regulated by microvessels within the myocardium to match myocardial energy demand. However, …
Lindsey M Boulet, Mike Stembridge, Michael M Tymko, Joshua C Tremblay, Glen E Foster
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Role of CO2 in the cerebral hyperemic response to incremental normoxic and hyperoxic exercise.
Cerebral blood flow (CBF) is temporally related to exercise-induced changes in partial pressure of end-tidal carbon dioxide (PetCO2 ); …
Kurt J Smith, K W Wildfong, R L Hoiland, M Harper, N C Lewis, A Pool, S L Smith, T Kuca, G E Foster, P N Ainslie
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Comparing and characterizing transient and steady-state tests of the peripheral chemoreflex in humans
Jamie R Pfoh, Michael M Tymko, Maria Abrosimova, Lindsey M Boulet, Glen E Foster, Anthony R Bain, Philip N Ainslie, Craig D Steinback, Christina D Bruce, Trevor A Day
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Measuring the human ventilatory and cerebral blood flow response to CO$_textrm2$: a technical consideration for the end-tidal-to-arterial gas gradient
Michael M Tymko, Ryan L Hoiland, Tomas Kuca, Lindsey M Boulet, Joshua C Tremblay, Bryenna K Pinske, Alexandra M Williams, Glen E Foster
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Chemoreceptor Responsiveness at Sea Level Does Not Predict the Pulmonary Pressure Response to High Altitude.
BACKGROUND:The hypoxic ventilatory response (HVR) at sea level (SL) is moderately predictive of the change in pulmonary artery systolic …
Ryan L Hoiland, Glen E Foster, Joseph Donnelly, Mike Stembridge, Chris K Willie, Kurt J Smith, Nia C Lewis, Samuel J E Lucas, Jim D Cotter, David J Yeoman, Kate N Thomas, Trevor A Day, Mike M Tymko, Keith R Burgess, Philip N Ainslie
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End tidal-to-arterial CO$_textrm2$ and O$_textrm2$ gas gradients at low- and high-altitude during dynamic end-tidal forcing.
We sought to characterize and quantify the performance of a portable dynamic end-tidal forcing (DEF) system in controlling the partial …
Michael M Tymko, Philip N Ainslie, David B MacLeod, Chris K Willie, Glen E Foster
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The contribution of arterial blood gases in cerebral blood flow regulation and fuel utilization in man at high altitude.
The effects of partial acclimatization to high altitude (HA; 5,050 m) on cerebral metabolism and cerebrovascular function have not been …
Christopher K Willie, David B MacLeod, Kurt J Smith, Nia C Lewis, Glen E Foster, Keita Ikeda, Ryan L Hoiland, Philip N Ainslie
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Impact of hypocapnia and cerebral perfusion on orthostatic tolerance.
We examined two novel hypotheses: (1) that orthostatic tolerance (OT) would be prolonged when hyperventilatory-induced hypocapnia (and …
Nia C S Lewis, Anthony R Bain, David B MacLeod, Kevin W Wildfong, Kurt J Smith, Christopher K Willie, Marit L Sanders, Tianne Numan, Shawnda A Morrison, Glen E Foster, Julian M Stewart, Philip N Ainslie
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Exercise-induced arterial hypoxaemia and the mechanics of breathing in healthy young women
The purpose of this study was to characterize exercise-induced arterial hypoxaemia (EIAH), pulmonary gas exchange and respiratory …
Paolo B. Dominelli, Glen E. Foster, Giulio S. Dominelli, William R. Henderson, Michael S. Koehle, Donald C. McKenzie, A. William Sheel
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