Why the study?
To investigate the effect of reduced inspired fraction of O2 on the correspondence between the respiratory compensation point and the NIRS-derived [HHb] breakpoint during a ramp-incremental test to exhaustion.
Does hypoxia alter the correspondence between the respiratory compensation point and the deoxygenated hemoglobin breakpoint during a ramp-incremental test in young active males?
Population
Eleven young males
Comparison
Hypoxia (FiO2 = 16%) vs normoxia (FiO2 = 20.9%) during ramp-incremental exercise
Design
Crossover study with testing on two separate occasions
Authors
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Preserved RCP-[HHb]bp correspondence in hypoxia; hypothesis-generating for integrated thresholds beyond healthy males.
Does hypoxia alter the correspondence between the respiratory compensation point and the deoxygenated hemoglobin breakpoint during a ramp-incremental test in young active males?
Breathing a lower FiO2 during a ramp-incremental test results in a proportional reduction in both the respiratory compensation point and the deoxygenated hemoglobin breakpoint, suggesting they reflect a common physiological phenomenon.
Azevedo et al. (2020) studied this question.
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