WOULD YOU LIKE TO KNOW YOUR “FITNESS AGE”? You know your chronological age, but how about your “fitness age”? Studies of fitness and lifespan suggest that a person’s fitness age, which is primarily a measure of cardiovascular endurance, might be a better predictor of longevity than chronological age. Your body’s capacity to transport and use oxygen during exercise is based on the concept of VO2 max, which is the most precise measure of overall cardiovascular fitness. Here’s more information on how your fitness age is measured and what it says about your lifespan excerpted from the July 17, 2015 issue...