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Oxygen Utilization

Meaning

The efficiency with which the body’s cells, particularly those in metabolically active tissues like muscle and brain, extract and use molecular oxygen (O₂) from the blood to support aerobic respiration within the mitochondria. This metric, often quantified by the maximal oxygen consumption (VO₂ max), is a direct measure of cardiorespiratory fitness and mitochondrial health, representing the ultimate capacity for sustained energy production. Optimal oxygen utilization is fundamental to cellular vitality and the efficient production of energy necessary for hormonal synthesis and signaling.