Dr. Peter Attia emphasizes that among all the habits that promote a longer life, exercise stands out above the rest. When 60 Minutes visited Attia's state of the art training gym in Austin, Norah O'Donnell underwent the same physical evaluation his patients do, including a demanding VO2 max test. VO2 max measures how much oxygen your body can use during intense exercise, which is a reflection of your cardiorespiratory fitness. According to Attia, it is one of the strongest predictors of longevity. #vo2max #longevity #fitness #excercise #cardio