Curves works because because you can burn up to 500 calories every time. The circuit is made up of resistance machines that work every major muscle group, two muscles at a time. Whether you want to lose weight and inches, gain energy or tone up, the Curves circuit will work for you. The Curves® Circuit with Zumba Fitness® is the only 30-minute class that mixes the moves of Zumba® with the proven strength of training of Curves for a wildly effective workout. You'll tone up, burn hundreds of calories, and have so much fun you won't even realize you're working out! Curves Complete is a specially designed, 90 day weight loss program that combines diet, exercise, and motivation to help you reach your weight loss goals. You can lose as much as 20 pounds of body fat in only 90 days!