Tango basic step (Basico con Cruzada)
The 'official' Argentine tango basic step is the short basic step supplemented by a cross step (cruzada).
The Basico con Cruzada consist of 8 steps with a duration of 8 counts.
During step 2, 3 and 4 one's torso is dissociated from the hips. This is a result of the leader leading with his torso and the continious connection between the dance partners. Drawing a line between the weight-bearing feet of follower and leader indicates the direction of both torso's facing each other.
YouTube contains a lot of movie clips demonstrating the Argentine tango. A fine example is the next clip of the "Academia de Baile" explaining the basic step (authentic version with a back step, cruzada included).
In the second film clip the cross system is added to the basic step. A weight change step of the leader is what it takes to get a dance couple into the cross system. And a half beat pause of the leader during the followers cross makes the couple return to the normal system. Once you master this trick, it will be just a small step for you to learn the back ocho.
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