How fast you can run a mile at age 55 is predictive of your risk for a heart attack. If you can run a mile in 15 minutes your lifetime risk of a heart attack is 30%. If you can run a mile in 8 minutes, your risk is under 10%. Exercise benefits our risk for hypertension, type 2 diabetes, being overweight, depression, anxiety, insomnia, and fitness. There is no treatment on the planet that does more for anti-aging than exercise. Being fit improves quality of life and longevity.