As you know I'm a fairly serious runner, and I hang out online (on the Runnersworld forums, and on Facebook) with a number of other fairly serious runners. A lot of them have regular jobs. (So do I, but mine is flexible.) I think the general feeling is that yes, it takes a lot of time to stay fit - but most people have the time, they just spend it watching television or goofing around on the internet or reading or whatever. It's a matter of priorities for leisure - I happen to like running, and walking, so I do it as my relax-time, but I don't like lifting, so that is time I have to carve out of other things and resent!