I'm considering doing some running, mainly easy paced for 15-25 minutes, after strength training (3x per week, full body, alternate press/bench, 1x front squat, 1x deadlift, 1x pistol squat, pull-ups or rows superset with pressing). I'm considering this to be time efficient, to give myself three good days where I stretch, strength train, and get some light conditioning.
My primary goal is strength, but I don't want my running to go to shit. I'm thinking that if I have some BCAAs/protein and carbs after the strength work, I shouldn't have a problem.
Edit: I should also clarify the meaning of "ruin your workout." By this I mean will running after a workout inhibit strength gains.