When you lift do you focus more on number of reps or weight? If you want to build more bulk continue with what you are doing but do less reps with more weight. This is what works for me: I start off with about half of what I know I can do and I continue until I can no longer do it (force yourself to get as many as you can, that's important) Then I work on another set of muscles and do the same thing. Eventually I come back to the muscles I started with and put on as much weight as I can do. Sometimes I can only do 3 reps, but it's not how many you do, it's forcing your body to adapt to the new load it's been handed. The reps that are easy don't build any muscle, it's the ones at the very end when you are grunting and feel like you are going to die that build the bulky muscle that you want. Go back through all the muscle groups and do the same thing. If you do many reps with lower weight you get long, lean muscle like you have now, not the big bulky stuff. Maybe you already know this, just thought I would throw my opinion out there.
