Rodney

Eat a decent meal _before_ your exercise or before your shift, then eat more lightly later. It'll keep you from binging afterwards. Believe it or not, prolonged light- to medium-duty cardio exercise like walking actually decreases the amount of food you want to eat afterward, _if_ you were well-nourished to start with.

Especially don't binge or eat right before bed, something that I know a lot of night-workers are tempted to do. The food is much more likely to be stored as fat.

As for other cardio things to do besides walking or running (cardio exercises being ones that get your heart rate up for a sustained period), I can only suggest bicycling or inline skating, or perhaps aerobics classes. There are other fun things you can do for cardio, but they involve paying money, and also involve having the right kind of facilities available. Some people I know get cardio from playing movement sports like basketball or soccer in community leagues (these leagues are usually labeled by ability, so you can find one with players at your own skill level), and so on.

As for working on your chest, you'd probably need weights for that; weight lifting is not a cardio exercise, as it involves short, heavy bursts of effort rather than medium effort sustained for long periods. But you can start working on that at home with a simple, cheap weight set, even just a pair of dumbbells. I think there's another recent thread on this board that talks about the different kinds of exercises you can do with just that simple equipment; dozens, maybe hundreds,