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Physical Stamina Index

Meaning

The Physical Stamina Index is a composite, objective metric used in rigorous clinical and performance settings to quantitatively measure an individual’s sustained capacity for prolonged physical exertion and their intrinsic resistance to the onset of fatigue over time. It serves as a comprehensive measure of systemic endurance that effectively integrates cardiorespiratory fitness, local muscular endurance, and overall metabolic efficiency. This index functions as a key, non-negotiable biomarker for overall physiological robustness and is consistently observed to be inversely correlated with both chronological and biological age and the clinical state of frailty.