Ballet dancer - 'How To Pirouette'

For reference, I attempted to capture movement and poses of a ballerina, however due to the quick edits and fast foot movement, I struggled to get detailed drawings. 

dance move, leg repetitively comes back to this position. 

Reparative pose, between above drawing and this one.  

Toes on pointe, pose

Positioning of feet

Positioning of feet

This has shown me a basic shape and form of the body that is used for twirls and basic footwork. 

Also shows different foot poses.