Journal of cardiopulmonary rehabilitation
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J Cardiopulm Rehabil
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J Cardiopulm Rehabil · Mar 1995
Failure of hyperoxic gas to alter the arterial lactate anaerobic threshold.
Oxygen-enriched gases enable patients and healthy individuals to exercise submaximally with reduced lactate concentration, lower minute ventilation (VE), and less subjective stress compared to normoxia. These findings suggest that hyperoxia may raise the lactate accumulation threshold, also known as the anaerobic threshold (AT). ⋯ The elevation of estimated PaO2 to 200 mm Hg does not alter the Lac-AT, compared to the normoxic condition, nor does it affect the arterial lactate concentration at its systematic break point in incremental cycling. Lac-AT is a reliable measurement and it can be estimated accurately using the VE/VO2 in conjunction with VE/VCO2.