I was looking at the different WBB routines and I think I'm going to try one of them. I notice there are 4 off days in the routine. In addition to building muscle, I'm also trying to lower my body fat % some. I was wondering if there are any adverse effects from replacing some of those off days with just a cardio workout, like running. I would most likely want to replace 2 of the 4 off days with running, but always keep the off-day after leg workout so I don't overtrain my legs. Does subjecting my body to a cardio workout during my recovery stage hinder muslce rebuild? Thanks for the advice.