When doing undulation, first lift your chest up by contracting your muscles and then contract the muscles in your belly to bring the movement back down.
In Egyptian belly dancing, an undulation is a common movement that starts with a chest circle and ends with engaging the abs to push the lower back backwards .
SHAKIRA DANCE.

To do the chest circle, youll need to isolate your chest in two different ways. Discover how to isolate your chest to properly do a chest circle with tips from a .