my body reacts better to high intensity, short intervals than lower intensity long intervals. So i'm only doing 4 sets per exercise, 1 exercise per bodypart using a pyramid method. I will do as many reps as i can with a certain weight (5 or so), then lower the weight and do a few more (3 or so). Doing that for 4 sets seems to work but i'm not sure if 4 sets is enough. How many sets per bodypart are you doing.