I have a quick question. If i am trying to get cut and build a little bit of mass. Is it better to do a full upper body on one day and lower the next (including abs on both days), but resting from weightlifting on weekends. OR Work out different muscle groups on different days, Like chest on monday, back & shoulders on tuesday, etc... Im not sure about the second one because i havent tried it, and i would like to know which combination of muscle groups i should do for the second one.