How to pronounce “middle distance” in English

What is middle distance?

So I came out of college being a middle distance runner.

Yeah, I started running middle distance.

My training for the first marathon was definitely more middle distance training.

and a long periods you would stare into the middle distance and make endless

So in college, I was middle distance.

paneling, a row of urinals stretching into the middle distance.

So now they have a 3K steeple, and then there's the 1,500, and the 5K is typically middle distance.

So besides marathons, do you run other professional sports like, as you said, middle distance, 5K, 10K?