A couple buddies had a problem with doing back and shoulder same day..push- pull...what do you think..im trying to builk a bit...Thanks

BASIC GET BIG ROUTINE

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Schedule
Day # 1: WORKOUT #1
Day # 2: WORKOUT #2
Day # 3: OFF DAY
Day # 4: WORKOUT #3
Day # 5: WORKOUT #4
Day # 6: OFF DAY
Workout #1
EXERCISE Set #1 Set #2 Set #3 Set #4
INC. DB PRESS - 12-10-8 Reps
INC DB FLYES - 10-10-10 Reps
DECLINE BB PRESS - 10-10-10-10 Reps
DECLINE DB FLYES (OPT) - 10-10-10 Reps
BENCH PRESS - 10-10-8-8 Reps
FLAT DB FLYES (OPT) - 10-10-10 Reps
Workout #2
EXERCISE Set #1 Set #2 Set #3 Set #4 Set #5
DB OR EZ BAR CURLS - 12-6-6-6-6 Reps
ALT DB HAMMERS - 8-8-8 Reps
SINGLE ARM PREACHER CURLS - 10-10-10 Reps
CONC. CURLS - 12-12 Reps
DB OVERHEAD EXT - 10-10-10 Reps
SKULL CRUSHERS - 10-10-10-10 Reps
DB KICKBACKS - 10-10 Reps
DIPS( HOLD@TOP) - 15-20 Reps
Workout #3
EXERCISE Set #1 Set #2 Set #3 Set #4
ARNOLD PRESSES - 12-10-10 Reps
DB LAT RAISES - 8-8 Reps
MILITARY PRESSES - 8-8-8 Reps
SHRUGS - 12-12-12 Reps
UPRIGHT ROWS - 10-10-10-10 Reps
DB ROWS - 10-10-10 Reps
REV. FLYES - 10-10-10 Reps
BENT OVER ROWS - 10-10-10 Reps
DEADLIFTS - 6-6-6 Reps
Workout #4
EXERCISE Set #1 Set #2 Set #3 Set #4 Set #5
SQUATS - 20-15-12-12-10 Reps
LEG EXT. - 12-12-12-12 Reps
HAMSTRING EXT - 10-10-10-10 Reps
STANDING TOE RAISES(CALVES) - 10-10-10 Reps
SEATED DB CALVE RAISES - 15-15 Reps