What is the Origin of Sustained Vitality Index?

This term is a lexicon creation within the advanced functional health and longevity domain, developed to quantify the abstract but clinically essential goal of "vitality." It is inspired by the need for more comprehensive, predictive, and actionable biomarkers than those typically used for diagnosing acute pathology. The Index attempts to provide a singular, holistic measure of complex systemic health status.

What is the Mechanism of Sustained Vitality Index?

The Index is theoretically maintained by the continuous, adaptive, and homeostatic balance of key physiological systems, which is driven by optimal hormonal signaling and high metabolic efficiency. It is mechanistically supported by a low allostatic load, indicating that the body's stress response systems are not chronically overtaxed or dysregulated. A high Index correlates with preserved genomic stability, robust mitochondrial function, and favorable free hormone ratios.

Sustained Vitality Index

Meaning

Sustained Vitality Index is a conceptual and clinically derived metric that quantifies an individual’s long-term functional reserve, psychological resilience, and overall quality of life, maintained at an optimal level across the chronological lifespan. It represents an integrated, holistic assessment that transcends traditional single disease markers to quantify the robust, high-level function of the neuroendocrine, metabolic, and musculoskeletal systems. The Index reflects the ultimate success of a personalized health strategy in achieving durable well-being and peak performance. It is essentially a composite measure of healthspan and functional biological age.