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Individual Functional Capacity

Meaning

Individual Functional Capacity represents the maximal physiological potential of an individual’s body systems—including cardiovascular, metabolic, neuroendocrine, and muscular systems—to perform work, maintain homeostasis, and recover from stress. It is a quantifiable metric of biological resilience and reserve, reflecting the body’s ability to adapt to external demands without incurring a significant allostatic load or systemic debt. High functional capacity is directly correlated with greater healthspan, superior vitality, and a reduced risk of age-related disease. This is a measure of true biological youth and vigor.