This project is meant to push you in the opposite direction of photography. Photographs capture massive amounts of information. Drawing from the figure, in this way, is about simplifying to identify only the most essential parts of the pose.
The challenge is to identify the relationship between the pelvis, rib cage and head. These three will define the essential movement of the body.
The limbs are the supporting cast in the play. Once you have established the relationships between the three forms you can enhance the qualities of the pose with the limbs. They can give context, weight and drama to the pose.