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The secret to these mind-blowing INSANITY workout results: MAX Interval Training. Shaun T took traditional interval training and flipped it on its head—you perform long bursts of maximum-intensity exercises with short periods of rest. Each INSANITY workout keeps you constantly challenged as you alternate between aerobic and anaerobic intervals performed at your MAX. The result: burn up to 1,000 calories
in an hour and get the most insane body in 60 days.