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Functional Reserve

Meaning

Functional Reserve represents the surplus capacity inherent in an organ or biological system beyond the level required to meet the demands of normal, resting function. This physiological buffer allows the body to cope with acute stressors, disease, or aging-related decline without experiencing immediate functional impairment. A robust reserve in key systems, such as the adrenal or cardiovascular systems, is a primary determinant of healthspan and resilience. Maintaining this reserve is a central objective of proactive health strategies.