Smoking affects your heart, your blood vessels, and your lungs. If you are overweight, your health care provider will probably recommend weight reduction. Being overweight affects your heart, your blood pressure, and your joints. Eat a well balanced diet, with plenty of grains, vegetables, and fruit. Cut down on fatty foods.
Exercise is as important to weight loss or maintenance as calorie intake.
Although exercise burns relatively few calories more than the resting state, it increases the basal metabolic rate. Therefore, you burn more calories per hour all through the day, and that adds up. All these aspects of health and fitness work together for your benefit. There is no reason not to stay as fit as possible as you get older. The result is well worth the effort.