Insanity Max 30?

Hi all! Has anyone done this program? My husband is doing it and it looks brutal, but I've just finished a strength program of 3 months and really enjoyed following a daily program. I'm considering trying this insanity, because my husband looks completely tortured while doing these workouts but is completely sold on them and goes on and on about how good it feels.

The other thing I'm not sure about it what I'd record for the calorie burn for something like this. My husband doesn't count calories (and is at a healthy weight and stays fit, grr!), but he says he's hungrier doing this. Anyone know what formula I should use to calculate burn for 30 minutes of high intensity, high insanity, everything training? All advice welcome.

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