Quick background - i'm 38, didn't start running until I was 24. I run 50 to 70 miles a week consistently, try to peak once a year for races between 5k and half-marathon. I run about a 17 flat 5k. Next 3 months in base, I've been thinking to mix it up, it would be a good idea to fold in some lifting, particularly leg lifting. Feels like I've been doing the same routine for a while so hoping this could help running just by changing things up.
So how do I start folding in lifting? I've been thinking 2x a week - plan to include upper body, squats, lunges (with weights), and possibly dead lifts. I lifted when I was younger so it won't be brand new - I just don't want to kill my running.
I live in a mountainous area so I already run plenty of hills. I thought a good plan was 2x a week cutting an easy flat run a little short, running to gym, lifting and then running the mile home. Any thoughts besides easing into it? What have people found that works best? After easy runs? After track work?