Skip to main content

Sustained Vigor Index

Meaning

The Sustained Vigor Index is a composite, clinical metric that quantifies an individual’s enduring capacity for high-level physical and cognitive energy, emotional resilience, and overall vitality over prolonged periods. This index moves beyond momentary performance to assess the underlying robustness of the neuroendocrine and metabolic systems that support long-term, consistent output. It is a critical indicator of hormonal balance, mitochondrial health, and the absence of chronic fatigue or systemic inflammation. A high index reflects optimal healthspan.