Comment by dahart

> You can’t simply take one year, exercise 24/7, and get your 10 years of life

That’s not what he said though. How would you demonstrate that it’s a good investment, do you have an alternative? For the purposes of calculating the ROI it’s a solid 24/7 year of accumulated exercise time. Of course you can’t do it all at once, but that wasn’t the claim. And sure you have to fit it into your life and sure there’s a little extra time go to and from your activities, but the ratio of exercise to time is roughly 1/80. If you exercise 45 minutes a day 3 times a week: 135 minutes out of 10080 minutes ~= 1/80. He said 4 times/week, so maybe he should have said 1.3/80, but that doesn’t actually change the point. Accounting for sleep and more exercise and lots and lots of travel+shower time, maybe it’s even as high as 1/20… still a great investment.