I'm 51 and have to agree that exercise is the KEY to weight loss at our age! I do an hour of cardio (half bike, half elliptical) every day and lift weights five days/week. Without all the exercise, I'm certain that I'd put the weight back on in ... oh, five minutes!
Start small, but in the back of your mind, keep the goal of making some kind of exercise a part of
every day. Build it into your routine - make it a normal part of what you do every day. I'm a morning exerciser and would feel totally lost if I wasn't at the gym first thing every morning. Other people do well with afternoon or evening - whatever works for you.
The benefits of exercise at our age go far beyond weight loss - there's cardiorespiratory health, prevention of osteoporosis, preservation of muscle mass, and generally keeping our bodies functional. There's nothing sadder than seeing someone our age who can barely walk or go up stairs. And if we want to stay independent and active as we get older, we've got to take care of our bodies!
Abbyin, when you add exercise to your healthy eating, you're going to see great results, both in the scale and how you look and feel!!