Syther saidI joined the gym last October as I wanted to bulk up and get more muscular.
I've always ran and I still do while incorporating my weight training.
The thing is I haven't bulked up as much as I wanted so far and I'm wondering should I stop running now in order to bulk up?
How much running is too much? I probably run around 20k a week.
First of all, it's only been 5 months. While everyone makes easy newbie gains at first (provided you're doing a REAL WORKOUT with big basic lifts, and you've been EATING MORE), your nervous system may still be adjusting to utilize more of your existing muscle mass before you grow. That will happen.
That said, yes running 20 fucking K a week doesn't help. Steady-state long distance cardio like that burns muscle. End of story. I don't care what the "if you like running, keep doing it" crowd says; they don't know what they're talking about. It's counterintuitive that that kind of running would kill muscle, but it does.
Ever seen a muscular guy jogging? I mean, truly muscular, not a skinny guy that's cut. Look at the Olympics. Why are the marathon runners basically skeletons? The short-distance sprinters, OTOH, are muscular. Short bursts don't kill muscle; they actually stimulate it.
So if you must keep running, consider switching to short sprints. Ditch the long-distance running.
20K...geez, man. Don't expect any progress while doing that.