Yep, thats why I recommend adding sprints, great for the knees, more effective than long distance, raises HGH levels in the body, gives you proportional legs and it is the way nature meant it to be
had a big problem with my right knee, started sprinting, disappeared like an evil spirit at an exorcism, stopped, came back a month later, started again disappeared. coincidence? hell no. I do this in a steep uphill to add intensity and spare the knees even more. Resting bpm=45-50, not bad results from less than half an hours running every third day...
What I did to bulk up fast when I started was to;
take cold showers ONLY (when possible of course)
sprint every third day, the day after resistance training
eat more over all (I would now change this to increasing animalistic fat and more vegetables/fruits)
drink green tea at least once a day
and lastly to
have a high intensity during workouts, see it as a mini cardio session which gets you better oxygenation where you want it. stay around 80-110 bpm (estimated number). this is easier for me when I am well hydrated, listen to music and work out alone.
If something hurts, you probably have bad posture, and posture is the most important thing in your workout. yep no.1.