That doesn't mean you can't deflate those fat cells with proper diet and exercise. Either you have a regular exercise regime or you do not. We are assuming you do not. In this case, you need to set up a regular pattern of exercise, the more often, the quicker you will see results. If you want to lose 15 pounds, we suggest you establish a workout four to five times a week with a minimum of 45 minutes of aerobics.
Strength training is important too but for weight loss, aerobics is the way to go.
Jogging is a heavy calorie burner as is power walking, treadmill, stairmaster and spinning. Diet is crucial for weight loss. Exercise helps burn calories but diet is what ultimately controls your weight. We cannot tell you how many calories you should take in on a daily basis as we do not know your body type or activity pattern. Go easy on the carbohydrates too as they add calories that turn into fat in the body.