I'm 51, and I only run a little more than half that much. On the other hand, distance only affects the on-road time. When you factor in getting ready and cooling down and stretching and dealing with gear and everything else, I probably spend more than an hour a day on average.

Then again, it's something that just has to be done. Some form of exercise is necessary to stay healthy and sane. I need to sleep and bathe, I need to do housework and pay bills, I need to do all that other adult stuff . . . and I need to exercise. Any option will take time. Like every other obligatory thing, that means less time reading or surfing the web or playing video games or watching TV or whatever. Oh well. Life's like that.

> It takes major dedication just to work that amount in, I have no idea how I'd spin up to do 40 mi/week.

Slowly, and do a little every day. Or at least, that worked for me. I do 3-4 miles a day (longer on weekends) for 25-30 mi/week total. I've worked up to that from zero over 18-24 months.