. It is impossible to lose weight without a level of exercise, no matter how healthy your eating habits are, sitting on the settee eating a celery stick is not going to allow you to lose weight. You need to get your body working and your blood pumping; even 30 minutes of physical activity a day will do you the world of good. Hurried walking, using the stairs, it does not have to be taxing, any exercise is good exercise. Swimming is a great way to get in shape as it exercises every muscle of the body, no strain is put on any of the joints and it can be very calming.