Over 9000 Curves gyms are located in different countries of the world promising permanent results without permanent dieting. The founder and the CEO of Curves International, a chain of fitness centres for women, Gary Heavin created also a diet plan to support and supplement the 30-minute workouts in the Curves weight loss centres.
The first Curves centre was opened in 1992. In the next several years it became the fastest growing franchise in the world. The book on the diet Curves: Permanent Results Without Permanent Dieting was published somewhat later, in 2003. Gary Heavin and his co-author Carol Colman elaborated two approaches towards the Curves Diet plan depending on a person's sensitivity to insulin: Carbohydrate-Sensitive and Calorie-Sensitive plans.
The Curves Diet is intended mainly for women and their problems with weight and obesity. The method combines physical exercises with temporary dieting plan. Physical exercises include 30-minute circuit-training workouts three times a week (the total of 90 minutes a week). The eating plan is another variation of a high-protein, low-carb regimen. This means the diet plan excludes bread, pasta, whole-grains and a lot of fruit.
The theory behind the Curves Diet is the necessity to reprogram one’s metabolism with a metabolic tune-up in order to make the body work more effectively. Permanent exercising helps to build muscle and keeps metabolism high which assists in calorie burning. A high metabolism makes the dieter lose weight faster and doesn’t allow gaining extra pounds in the future.
Weight loss with the Curves Diet is relatively slow. The dieter can expect to lose 6 to 10 pounds in the first two weeks followed by 1 or 2 pounds in the next weeks.
The apparent advantage of the Curves Diet is its versatility and possibility to be used by women at different levels of physical health and overall fitness. Older women and women with such diseases as arthritis, diabetes, osteoporosis and some others may follow the diet and join the Curves fitness program. The diet teaches to control portion sizes and manage nutritional requirements.
Alongside with positive the diet plan receives its portion of negative criticism. The critics claim that the weight is to be regained once the dieter stops following the calorie restrictions of the program. The daily consumption of 2,500 or 3,000 calories during the maintenance phase is also highly criticized because the body adapts to the calorie increase and the weight will eventually increase.