Requirement should be PF's, centers, outside hitters, or middle blockers.
On a case-by-case basis, goalkeepers and central defenders can be considered. Certainly women's rugby players can be included in many instances.
No cheerleaders, no gymnasts, and no Cougarettes.
On this subject, Tina had it right.
https://www.youtube.com/watch?v=oGpFcHTxjZs