4 days between hitting the same muscle again (like someone already said) strikes a nice balance between hitting it once or twice a week.
There are several ways to implement this. Already mentioned was a push - pull routine, but this is my current routine, works pretty well.
this routine will especially up your bench as your delts and arms are recovered when you hit pecs again. As opposed to training twice a week where delts may be still fatigued (maybe if you do a heavy roid cycle you can recover fast enough to max out twice a week, but i wouldn't do it)
Current split:
pec - forearms - abs
delt - trap
bis - tris - abs
quads - calves
hams - back
REPEAT
There are several ways to implement this. Already mentioned was a push - pull routine, but this is my current routine, works pretty well.
this routine will especially up your bench as your delts and arms are recovered when you hit pecs again. As opposed to training twice a week where delts may be still fatigued (maybe if you do a heavy roid cycle you can recover fast enough to max out twice a week, but i wouldn't do it)
Current split:
pec - forearms - abs
delt - trap
bis - tris - abs
quads - calves
hams - back
REPEAT