Insanity® is a total body workout that requires no gym or equipment, instead using your own body weight for resistance. The programme is based on a fitness method called "max interval training". In traditional interval training, you exercise at a very intense pace for a short period of time. However, max interval training makes you work as hard as you can for 3 minute intervals, with 30 second periods of rest in between. According to the Insanity® web site, exercising at this extreme level will help you burn up to 1,000 calories an hour. The main focus of this class is to increase your aerobic fitness level whilst buring fat.