On my street there are several lampposts and electrical poles, each one approximately 100 meters apart.
I’ve paced some of them out before, but never written down the exact count, or measured using GPS.
That’s because the exact distance between those poles doesn’t matter.
What matters is that I get my butt outside and run sprints back and forth between them, as often as possible, as fast as I can, in varying styles and sets.
Forwards, backwards, short, medium, long, repeats, side shuffles, with or without rest in between.
Measuring the distance that you run does matter, but how you run that distance matters more.
Matt Fried 