In LMA, "alignment" means various elements moving or facing the same direction. For example, two sides of a joint moving or facing the same direction is alignment. When two sides of a joint don't move together, you get shear force and possible injury.
In this video, I am keeping my head aligned with my trunk. I'm swinging my arms to generate momentum to power my movements, just as kids swing their legs on a swing or how we swing our arms while walking or during a jump.
