A virtual weight-loss simulator shows a person what her body can look like if she losses weight. Weight-loss simulators take into account a person's height, current weight, body type and goal weight. Based on this data, a weight-loss simulator can visually demonstrate potential changes in appearance due to weight loss.
More advanced weight-loss simulators can also show how specific exercise can affect weight loss. The purpose of these simulators is to provide a visual representation of weight-loss effects and to provide encouragement. The person sees what she can look like at a specific weight, and she can determine how much exercise is needed to accomplish her weight-loss goals.