Strength training for runners in 2021

I’m going to tag the date on this because our knowledge changes and I’ll probably post an update every once in a while. Hopefully, more than once every 20 years.
I’ve been having discussions with a few runners on strength training recently and I’ve realized that my very old post about strength training, while not entirely invalid, is outdated. Of course, I wrote that somewhere around 20 years ago so what should we expect?
So it’s time for an update. Is strength training good for our running and, if so, what should we do?
The answers are yes and it depends.
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