Speed on a treadmill is measured by how fast an object is going compared to the surface of the treadmill. NOT on the air speed of the object IE: A human is running 8 MPH on a treadmill set to 8 MPH. The human is sitting still in relation to the air around him. We still say “I’m running 8 MPH on my treadmill”
This is so fucking stupid it makes my head hurt.