Insanity uses a method called . You exercise at maximum capacity for three to four minutes, followed by a brief 30-second rest period to catch your breath. This continuous loop keeps your heart rate elevated, forcing your body to burn up to 1,000 calories per hour and burn fat long after the workout ends. The 60-Day Calendar Structure
Insanity is a 60-day cardio-based home fitness program that requires zero equipment. Unlike traditional high-intensity interval training (HIIT) where you exercise at maximum effort for a short burst and rest for a longer period, Insanity turns interval training on its head. The Science of Max Interval Training download insanity workout free