Luckily, I work in a job where it's quite easy to stay in good shape, IF you choose to. I work for a utility company installing gas lines, and if you're ambitious enough to get your ass off the backhoe and bulldozer (and I am), then there's plenty of opportunity to get LOTS of aerobic exercise, and muscle building exercise as well. I make it a point to do the physical work that some other co-workers shy away from -the shoveling, the jack-hammer, the sledge hammer, the frost bar, the rock drill, etc. I work at a fast enough rate to keep my heart pumping at a brisk, steady pace, and it shows. I'm 6' 1'', 195, never have had high blood pressure, or bad cholesterol, or bad sugar. So I don't have to follow a strict exercise regimen at home, though I do try to ride my bike for an hour or so, 2 or 3 times a week.