If you are a runner by nature then your recovery from running will be better then other people. I am currently running 40 miles a week, soon to go to 50, and have still been making strength gains on SS. I am also not trying to gain weight and am almost 48 so my recovery is not as good as yours. If you eat enough and get enough rest you should be ok. Your gains will not be as quick as if you were not running but you can still make progress. The hard part is not burning out as you will have doubles on some days and 9 training sessions.