VO2 Max is the single strongest predictor of all-cause mortality in the clinical literature — stronger than smoking, diabetes, or coronary artery disease. Learn what it actually measures, why the "220 minus age" formula is getting your training zones wrong, and how a 12-minute clinical test reveals the cardiovascular ceiling that limits everything else.

VO₂ Max is the strongest predictor of your future health — better than cholesterol, weight, or blood pressure. Learn what it means and how to improve it.