If you're trying to lose weight, you'll have a much easier time if you exercise. Exercise keeps your body's metabolism from going into a deep dive, which is especially important for people as they age. The key is to find a physical activity that you really enjoy and go for it. Love to dance? Sign up for a dance class or the like. Love to ride a bike? Find a way to bike to work or to the store. Even those who don't love exercise - and there are a lot of us out there - can find ways to work physical movement into our lives in an enjoyable way.