I'm with you man.. 2 completely different schools of thought. In Arnolds Encylopedia of Bodybuilding, he recommends each body part 3x per week with a lot of volume.. 3-4 exercises per muscle group and 4-5 sets each (abs, calves, rear delts every day) Then you have the Dorian Yates/Mike Mentzer style of training with 1x per week/low volume/high intensity. In Chris Aceto's book Championship bodybuilding, he recommends somewhere in between with a 5-6 day split. All of these guys are credible, so which split is optimal? :banghead:
I have been experimenting with different splits recently and so far have had the best (short term results) using the below 2x a week periodized split. The results were spectacular for the first 2 months (inch on arms in 7 weeks) but then I didn't grow much LBM afterwards, which just leaves me even more confused..
Mon - Chest/Tris/Abs
Tue - Back/Bis/Traps
Wed - Quads/Hams/Calves
Thu - Repeat Mon routine
Fri - Repeat Tue routine
Sat - Calves/Shoulders
I periodized it by high rep, mid rep, high rep, low rep, repeat. For example;
Wk 1-
Mon/Tue/Wed - 3x15 reps
Thu/Fri/Sat - 4x10 reps
Sun - off
Wk 2-
Mon/Tue/Wed - 3x15 reps
Thu/Fri/Sat - 6x6 reps
Sun - off
Repeat.
I have yet to try each body part 3x per week, but I will soon.