As far as I know, training the same muscles every-day (or in consecutive days) is not a good idea. The muscles can't rest long enough to regenerate and you are "over-training".
But, as far as I know, the muscles need 36 hours (roughly) to rest. So, in theory, if I want to grow muscles and I have an optimal diet for this purpose, is a routine like this one OK :
- Day 1 : Legs (every muscle)
- Day 2 : Upper Body (every muscle)
- Day 3 : Legs
- Day 4 : Upper Body
- Day 5 : Legs
- Day 6 : Rest (it's week-end dude !)
- Day 7 : Rest
- Day 8 : Upper Body
- Day 9 : Legs
- Day 10 : Upper Body
- Day 11 : Legs
- Day 12 : Upper Body
- Day 13 : Rest
- Day 14 : Rest
(Example on two weeks so your upper body won't be smaller than your legs)
Is there enough rest in this routine ? Knowing that this routine is for "bodybuilding".
UPDATE FOR CLARIFICATION
Since some answers are not really answering my question, it seems my question is not really clear.
So, the main question is this one : is training to failure (in 8-12 reps) the same muscles every other day (and with two days of rest per week) over-training ?