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Systemic Energy Reserves

Meaning

The total available physiological capacity within an individual to produce and sustain energy (ATP) across all major organ systems—muscle, liver, adipose tissue, and brain—essential for continuous, high-level function and rapid recovery. This is a measure of metabolic flexibility and mitochondrial health, reflecting the body’s ability to efficiently switch between and utilize different fuel sources, such as glucose and fatty acids. Maintaining robust reserves is critical for enduring periods of high professional demand.