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On the PX90 website I read somewhere that the average calorie burn is 500 calories.
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I don't know that I can really answer your question, but I've just started P90X this past Monday. My arm pits are so sore from all the push-ups & the insides of my thighs from the pyrometrics. Tonight is arms & shoulders. I talked my husband into doing it with me because I knew I wouldn't stick to it if it was only me…
