Dieting is the practice of eating food in a regulated fashion to decrease, maintain, or increase body weight. Dieting is often used in combination with physical exercise to lose weight in those who are overweight or obese. Some athletes, however, follow a diet to gain weight (usually in the form of muscle). Diets can also be used to maintain a stable body weight.
Diets to promote weight loss are generally divided into four categories: low-fat, low-carbohydrate, low-calorie, and very low calorie. A meta-analysis of six randomized controlled trials found no difference between the main diet types (low calorie, low carbohydrate, and low fat), with a 2–4 kilogram weight loss in all studies. At two years, all calorie-reduced diet types cause equal weight loss irrespective of the macronutrients emphasized.
Long-term studies of dieting however indicate that the majority of individuals who dieted regain virtually all of the weight that was lost after dieting, regardless of whether they maintain their diet or exercise program. Weight loss by dieting, while of benefit to those classified as unhealthy, may also slightly increase the mortality rate for individuals who are otherwise healthy.
The first popular diet was “Banting”, named after William Banting. In his 1863 pamphlet, Letter on Corpulence, Addressed to the Public, he outlined the details of a particular low-carbohydrate, low-calorie diet that had led to his own dramatic weight loss. The key to successful, healthy weight loss
Your weight is a balancing act, but the equation is simple: If you eat more calories than you burn then you gain weight. If you eat fewer calories than you burn, you lose weight.
Since 3,500 calories equals about 1 pound of fat, if you cut 500 calories from your typical diet each day, you’ll lose approximately 1 pound a week (500 calories x 7 days = 3,500 calories). Simple, right? So why is weight loss so hard?
All too often, we make weight loss much more difficult than it needs to be with extreme diets that leave us cranky and starving, unhealthy lifestyle choices that undermine our dieting efforts, and emotional eating habits that stop us before we get started. But there’s a better way! You can lose weight without feeling miserable. By making smart choices every day, you can develop new eating habits and preferences that will leave you feeling satisfied—as well as winning the battle of the bulge.