
If, like some people, "exercise" is a four-letter-word for you, then I've got good news: you don't have to "exercise" to lose weight. I didn't. BUT, if you sit around on your butt all day, it's going to be hard. I lost 50 pounds without doing any exercise routines, and I've kept it off without doing them too, but if I was also sitting on my butt all the time, I wouldn't be able to keep it off. I don't do what most people call exercise or working out, and I lost and have kept off 50 pounds for several months, but I'm at a plateau and I have to do something about that to get rid of the last 30 pounds I don't want.
That something is called "being active". It's not exercise, it's simply avoiding total laziness.