Weight-loss plans typically involve DIETS, which are a set of instructions for what to eat and when. They often include specific foods that are low in calories and high in nutrients, as well as guidelines for portion sizes and meal timing. Exercise is also usually part of a weight-loss plan, as it helps to burn calories and build muscle. Other components of weight-loss plans may include lifestyle changes such as getting enough sleep, reducing stress, and avoiding unhealthy habits like smoking.