Most people over 50 track the scale, blood pressure, or cholesterol — but one of the most important markers of long-term health is your cardiorespiratory fitness. In this episode of Over 50 Fit Life, we break down VO2 max in plain English and explain why it acts like your body’s “reserve tank” for stairs, travel, yard work, recovery, and everyday independence. You’ll learn how Zone 2 training, the simple talk test, strength training, and three weekly brisk walks can help you build a stronger engine after 50.