rep amounts stay the same and increase by week until i can do the wieght 12 12 12.
it is based off of a 10 re max to start. so i did say i could do 115 12 times previously but it is 10.
then if i can do the wieght 12 12 12 that week i increase the wieght the next week and start back over again at the 8 rep range.
OK, I get it...
So try this next time just to change it up...
Instead of doing one weight 12 12 12 or whatever, try starting a little lighter, say 100 and do 12...
then to 115 say, 8 reps...
then to 125 6 reps
then to 135 4 reps
then back down... 115 6 or 8 reps, 100 10 or 12
Pyramid it... that way you're progressively putting more stress on the muscle you're working as it gets more fatigued and it will grow.
What else do you do in your workout exercise wise?
For example... on chest day I would:
Warmup (treadmill or bike, 10 minutes)
Warmup my chest (3 sets on pec deck at medium low weight)
Barbell Bench Press (pyramid sets as above)
Incline Dumbell Press (Pyramid sets)
Decline Barbell Press (Pyramid sets) or body weight dips ( 3 or 4 sets of whatever you can do)
Cable Flies (3 or 4 sets at medium weight focusing on form and squeezing muscles hard)
Cool down, stretch...