i have just switched from one body part per work out to this, in hopes of getting in more workouts/week and at the same time get lots of rest. a little different, but no group is ever sore from the previous days workout so it's been working well so far.
day 1: back/arms
day 2: legs/abs
day 3: -rest-
day 4: chest/shoulders
day 5: -rest-
day 6: repeat
i like it cause i rest before and after chest, which is one spot i am looking to increase the most. i do 7 sets of tri's on day 1, and 3 sets on day 4 as well.