I've been lifting for a few months now and I would like to improve my results, if possible. I lift 6 days a week. I am on a 4 day split. Chest/Tris, Legs/Shoulders, Back/Bis, Abs/Cardio. I don't see any reason to change this right now as I have tried a few different splits and I like this one the best.
I do 3 different routines for each muscle group so if its a Chest/Tri day I will do 3 Chest workouts and 3 Tricep workouts. 3 sets for each and try for 7-9 reps and I usually get 9 reps in.
(1) Should I be doing 4 routines for each muscle group? Will that improve my results?
(2) If I'm getting to 9 reps does that mean I'm being a wuss and not truly using as much weight as much as I can? Does this happen to a lot of people where they go to the gym and don't truly lift as much weight as they should be lifting. Is it the case where you should really be going all-out on everything to the point where you literally can't complete the motion after 7 or 8 reps?
(3) 2% or skim milk?