system
Given the following post, respond as if you're commenting on Reddit:
human
How do I know the exact pace to stay on a treadmill?

I've started running seriously recently and it felt kind of unnatural that I knew the exact speed to run at to stay at the same spot in a treadmill.  

Is this a learned action?  Or can anyone just get on a treadmill and run?
gpt
The human brain has evolved a very good sense of motion.  It helped us survive the wilds.  It helps you pull out into traffic without getting hit by a car.  It allows your brain to also be fooled and think there is motion where there is not.  This is the reason why we can watch movies and perceive motion on a flat glass surface full of lights.  Obviously Jack Bauer isn't actually in your living room torturing terrorists.

Basically your brain autocorrects your pace to stay stagnant in that one position based on visual sensory inputs.  Close your eyes and try to stay in the same spot on a treadmill suddenly it's not quite as easy anymore.