* Sagittal plane: This is the plane that divides the body into left and right halves. The lunge itself occurs in this plane, with the forward leg moving forward and the back leg moving backward.

* Transverse plane: This is the plane that divides the body into upper and lower halves. The rotation component of the lunge happens in this plane, with the upper body twisting in either direction.

Therefore, a lunge with rotation is a multiplanar movement that combines both sagittal and transverse plane motions.