Why the insanity workout is insane! For those of you who prefer home workouts rather than the gym, programmes like insanity may seem like a good option. The adverts sure are persuasive; '1 year of fat loss in 60 days' 'burn 1000 calories an hour', who wouldn't want that? However when you analyse the programme for the person they are marketing to (a person out of shape, not used to exercise, looking for a quick fix), it is dangerous and highly likely to cause injury, as well