Body Opus is the back bone from which Lyle Mcdonald fashioned the UD2.

and just so ya'll know, the UD2 is now 40 bones ... unless you go order from amazon its like 32 or something.

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I don't do this for my family, my friends, women, accolades, pride, or ego. I do it for me and no one else, its just part of who I am.