Running is my hobby. I don't know why ppl can't run at minimum 10k at whatever age they're at, but when it happens to me I'ma commit that.
Just read the fitness/health related threads on here and you will see why. Most of the people on here can barely run a mile without stopping and that's being generous.
Desk jobs or jobs in general are why people don't work out. Wake up, commute 45 minutes, work 8 to 5, commute 45 mins back. Check up on kids. Cook. Clean. And that's if you work a laid back job during slow times.
shyt takes discipline and structure to do. Waking up at 5am so you can do it before or going at 9pm after everything is done. If I was to give advice, I'd tell people to build a home gym, because going to a commercial gym, especially during winter months takes convincing. Some dumbbells, tread mill, and a jump rope should at least help people get started on the right path.