I used to play hockey, wherein I would have at least 2 hours every day, every week, working out and/or skating.
I stopped playing years ago though, but since then I have kept a fairly good level of fitness going. I think my instructor got it branded in my head how exercise is good, but I don't feel myself going to work out because it is healthy, but because I like how it feels. I like that challenge when working out, getting the blood flowing and being active. When I played hockey, that feeling was always there and I hardly had to try after I became so used to it. Now I just have to make the effort every week to get that time in. And while it is nowhere near the amount of time I used to spend on it, I believe it is still a healthy dose. Works well for me at least.