I had a conversation with my friend Ben about this. Ben (and his son) was a competitive runner in college:
Me: In a running race, what’s the purpose of a pacesetter?
Ben: The pace setter helps make sure the pack of runners doesn’t get out too fast or slow. This is often used when some runners are in contention to break a record. It takes some of the guesswork and mental stress out of the start of the race. The pacers tend to run about half of the total distance, which is why it is only one lap for this race.
Me: Does the pace setter run at a specific pace? Or just really fast?
Ben: At a predetermined pace, which is communicated to all runners in the race.
Me: That’s what I thought, so, here’s the crux of my question: if the pacesetter knows how to run at a specific pace, why don’t the other runners?
Ben: They do know. But they can get caught up in the competition and lose sight of their pace, causing them to go out too fast or too slow. That would eliminate their chances of setting a record. A pacer isn’t concerned about racing. Only about hitting a predetermined time.
Me: And the pacer can only run that fast because she’s only running half the race?
Ben: Exactly