Over the past century, various running drills have been codified and, going under different names and with various claims, most coaches have used them. My take on the subject is that one exaggerates running motions, usually at high speed, to keep mobility and strength from being squelched by the small tissue tears of training.
There are a lot of drills possible, so I won't cover them, except to point out that Lydiard's hill-springing differs from sprinting uphill or running stairs by exaggerating flexion at the ankle - so these have been around at least 50 years.
As I've been using hamstrings for examples, walking lunges are an eccentric hamstring strengthening exercise that's done with one exaggerated piece of a running motion, making them a drill, as opposed to deadlifts/good-mornings.
|I wouldn't recommend holding weights over your head.|
The problem is: no one ever actually does these exercises unless their coach is standing in front of them! Everyone hates doing them. So, what you want to do is to mimic the motions while going for a run. You can intentionally work a different muscle harder than usual for 50 meters during a run and then go on to do another. If you run difficult trails, both extremely steep hills and with bad footing, you can work all of these muscles without thinking about it. It's a lot more fun than drills, but you have to think about it and really work, rather than just go through the motions.