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Thanks for a ton of good info there, Blackadar. When you talk about putting these in a rotation with another video series - are any of these structured in a way where it is supposed to be a set period of time devoted entirely to one workout program? I had thought that was part of the idea with P90X ... 90 days with pretty careful crafted workout routines for each day/week/month. Or am I completely off-base with that assumption?
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