Overnutrition is a major problem in the developed countries of the world today, and obesity is its clearest manifestation. Overweight is defined as body weight in excess of an ideal weight based on height and sex specific standards. Overweight can result from excess accumulation of bone, muscle, fat, or, more rarely, fluid. Almost everyone who is more than 20% overweight is also over fat or obese. The present study will describe a method developed to teach cardiovascular patients how to change their eating habits and thus lose weight. Videotape replay was used to facilitate the teaching therapy.