Phaedra-Borzoi.com

As the dog pushes off, the rear leg reaches the mid center of gravity in the middle of the dog and on the midline, and pushes it forward and at the same time the front leg is hitting ground and pulling the dog forward…it is a push pull movement not a float…it should be a strong ground covering stride, appearing effortless but has power evident! 

This is why single tracking is important and it allows the front and the rear push/pull leg to be pivots under the center of gravity of the dog producing an energy efficient motion. 

The neck and topline muscles

work in unison during the stride to

allow the body to freely move within the sling of the shoulder."