Key result
The authors propose that the SpO2 to FiO2 ratio (SF index) can be used to individualize the administration of hypoxia in sport science and health settings, rather than using a fixed FiO2 approach.
The SpO2 to FiO2 ratio (SF index) is proposed as a practical tool to individualize hypoxic training doses, accounting for significant inter-individual variability in physiological responses to hypoxia.
Human responses to hypoxia (i.e., reduced O2 supply) range from immediate adjustments (minutes to hours) to prolonged adaptations (several weeks) within various physiological regulatory systems (Guillemin and Krasnow, 1997)...
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Soo et al. (2020) conducted an editorial in Hypoxia. SpO2 to FiO2 ratio (SF index) vs. Fixed FiO2 approach was evaluated. The authors propose that the SpO2 to FiO2 ratio (SF index) can be used to individualize the administration of hypoxia in sport science and health settings, rather than using a fixed FiO2 approach.
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