Physical exercise is one of the best anti-aging interventions at our disposal. Indeed, it may be the best. You have no doubt heard this before, but you probably don’t realize just how powerful it is. Epidemiology has provided some particularly compelling evidence. Research has shown , for instance, that cardiorespiratory fitness is one of the strongest predictive factors for survival into old age. In one study, men with the lowest exercise capacity were 4.5 times as likely to die within the follow-up time period, compared to those with the highest exercise capacity. And in men aged 75 , exercise capacity was the most powerful predictor of survival to age 90 , exceeding that of conventional risk factors like smoking, high blood pressure, total cholesterol, and obesity. Exercise capacity is a more powerful predictor of mortality among men than other established risk factors for cardiovascular disease. So if you want to live a long life – and more importantly, a healthy and