Is VO₂max Training worth prioritizing?

Cardiorespiratory fitness (VO2max) is one of the most extensively validated predictors of mortality in the scientific literature, supported by multiple large meta-analyses spanning tens of millions of observations and hundreds of cohort studies, including a scientific statement from the American Heart Association recommending it be tracked as a clinical vital sign. Weighing that against the numbers, VO₂max Training is a strong candidate to prioritize — it combines strong evidence (90/100) with a high estimated impact on longevity (95/100).