Axis (plural: axes): Imaginary line running through the body (up/down, left/right, or forward/back). Axes stay stationary relative to an audience when your body moves in circles.
Up/Down Axis (U/D): An imaginary line running from a point above your head to a point beneath your feet.
Left/Right Axis (L/R): An imaginary line running from side to side when facing the audience.
Forward/Back Axis (F/B) : An imaginary line running from the audience to a point directly behind you when you face the audience.
3 AXES: Up/Down, Left/Right, and Forward/Back
The drawings above represents 3-dimensional space around your body. . . anybody’s body!
If you trace a line UP/DOWN like a lightsaber from your crown of your head to your tailbone and between your heels, that’s the Up/Down axis (Y), and it’s YELLOW!
Now trace a line FORWARD/BACK from a imaginary point in front of your heart to some place right behind you. That’s the FORWARD/BACK AXIS (Z), and it’s Red!
The LEFT/RIGHT AXIS (X) is Blue. This teaching assumes an audience, so that when you’re facing the audience, the left/right axis is the same as when you turn in circles.