My first year of bodybuilding was back when I was 15 and still in high school. In order to get our drivers license we have to pass physical education. Its' required by the state. So this was one of my classes for the first semester or 18 weeks. The only thing the class involved was running everyday for 40 minutes.
Well I had to get my drivers license and I had to grow some big ol' chunky thick legs to haul around these massive lats, pecs, arms, delts, etc. So what was I to do? I had no choice. I made it work. The first two or three weeks were rough. Even at the young age of 15 I went all out on leg training. I was taught how to bodybuild at a very young age by a very good up and coming bodybuilder. The first workout he ever took me through was Leg extensions, Leg Press, Hack Squats, Smith Machine Squats, Leg Curls, stiff leg deadlifts. This was the first time I EVER trained legs. Had only been lifting weights period for about 4 weeks. Every exercise consisted of 4 sets and rep ranges in the 15 to 20's. I couldn't quit or give up or take it easy because I knew what he (my bodybuilding trainer) was doing. He was testing me. I was the youngest guy in a gym full of seasoned and competitive bodybuilders. I knew I could learn a lot. I knew If I completed this I'd be one of them. When he took me through this workout several of the other bodybuilders were standing around watching and laughing. But I never gave up. After that I earned their respect and that was all that mattered to me. A 15 yr old in the company of 21-45 year old bodybuilders who decided to take me under their wing.
So even though I had to run everyday for school, it was state required, I was going to let my new "family" down either. I forced myself to run everyday with severely sore legs. Once my body started getting used to weights the running got a lot easier. I just got use to it. After a while it was nothing.
Honestly though, nothing is better for leg development then some hardcore strength training to build up those white fibers, then some running to activate those red fibers. You should have some phenomenal looking legs after a couple months or so. The only thing I'd try to be careful of is making sure you plan both types of training out to where one doesn't hinder the other. Recuperation is up to you. The more your body gets accustomed to this type of trauma the faster you'll recuperate week from week. So I wouldn't be to concerned about one or the other effecting the others gains. Just make sure they're not performed so close together that they hamper each other's training though. See what I'm saying?
Good luck with everything.