Twisting Undulation: Intermediate-Advanced Belly Dance Technique and 30-min. Non-Stop Practice. Combinations and choreography taught in a non-dtop dance with music format. "Belly dance is taught through isolations, an important element of belly dance aesthetics. However, focus on isolations often results in stiffness - you end up dancing with frozen spine and chest. As intermediate/advanced dancers, we need to graduate from isolations to grasping the full body dynamics. The "twisting undulation" is a good shortcut to connecting your lower and upper body in a number of dance movement contexts."