Six simple things that increase life expectancy
In fact, studies suggest that daily exercise can add up to three years to your life. . . .
Assuming one works out one hour a day, that you are awake for 16 hours a day, and a zero interest rate, in 48 years you would have spent an amount of time exercising to the increase in life expectancy. Discounting by even a small interest rate would dramatically reduce the number of years that one would have to exercise before the work canceled out the benefit.