Authorship and the Boundaries of Copyright: Ideas, Expressions, and Functions in Yoga, Choreography, and Other Works

One man created a series of bodily movements to be performed with musical accompaniment by a group of people. Another man created a different series of bodily movements to be performed with different musical accompaniment also by a group of people. The first man was Vaslav Nijinsky, and the creation was the choreography for the ballet Le Sacré du Printemps. The second man was Richard Simmons, and the creation was Sweatin’ to the Oldies. Is there a difference between these creations for purposes of their copyrightability? If so, where does it lie