Lately,,, I've had several girls tell me they feel they get too bulky when they lift weights. I really think there is a big misconception about what causes bulk. Bulk isn't all muscle; it is muscle covered by fat! So if you feel that you are too bulky, then it is important to fine tune your diet to lose the excess fat -- not give up weight training.
If your goal is to move and look like the Hulk, then feel free to continue performing body-part splits and hitting every machine in the gym. Those machines have their place, but they are not indicative of every training program!
If your goal is to look, move and feel like an athlete, you need a different approach. Elite athletes need their body to function as an efficient unit. Splitting the body into parts like legs, chest, back and biceps will not meet that goal, Instead, focus on big-bang movements that utilize multiple muscle groups!