When walking front and back, we need two concepts to describe precisely the improvisational possibilities.
The first is where we are walking. We can walk on two, three, or four tracks.
The second concept is which pair of legs move simultaneously. To identify accurate terminology, we refer to the science of the gaits of 4-legged animals. When both partners step with the mirrored leg, the correct term for describing this four-legged gait is pacing, or ‘pace-system’. When partners step with the diagonal pair, the correct term is trotting, or ‘trot-system’.