Check out the attachment for a pretty simple one-sheet pros-and-cons list of static (holding) and dynamic (moving) stretching.
This from a good friend and an excellent physical therapist who helped me figure out some knee pain I was having when training for my first marathon a few months ago. Part of his recommendation was a dynamic stretching warmup routine, which I immediately questioned, as I’d always heard warm up first, then slow, static stretching for five or ten or however many minutes.
So he sent me this, along with his routine, all of which ended up treating me really well.
More questions on this? Shoot me a line, of course, and I’d also be happy to pass on my friend’s work information if you’re looking for an awesome PT.
Liam Bowler 
This is fantastic! I had a hard time opening up the link, but I am always interested in great practitioners to refer to. Let me know if your friends would be a good fit for a local PT accepting new patients.
Thanks,
g
Hey Guinevere ~ Sorry you had a hard time with the link. It’s here: https://liambowler.files.wordpress.com/2010/11/sl_staticstretch1.pdf
Also, yes, his name is Brian Crosier. He works in Madison Valley for Therapeutic Associates. He’s a great, super smart therapist, specializing in foot and ankle issues. I think he’s still accepting new patients, but probably not for long.
Peace, LB