If she want's to be a mama, wouldn't you think she would have the itchin for a rooster?
Going broody has nothing to do with a rooster. It is instilled in hens, it can be more predominant in certain breeds due to heredity/genetics just as it has been bred out of most breeds so mankind can have more eggs. If a broody is sitting, she isn't laying eggs and most people want the eggs... not new chicks.
A broody will sit on fertile eggs (if you have a rooster you probably have fertile eggs), non fertile eggs (if you don't have a rooster the eggs are not fertile and cannot grow into a chick), golfballs, fake eggs -- even nothing!
I'm not sure if MsBentleyboy was trying to describe broodies but what she described is not broody behavior. That was just teenage behavior of chicks trying to figure out where the best place to sleep is.
You do not need to move your broody - she will not stiffen up. She was made to sit there for weeks without hurting herself as long as she gets food and water she will be just fine. Almost all broodies will get up off their nest once a day to get food, water and go poo.
Do you have access to fertile eggs? (I had some mailed to me from a fellow BYCer when my hen went broody as I don't have a rooster.) Do you want her to hatch chicks?
If you don't want her to hatch chicks then you should try to break her of being broody. The best suggestion that I've heard, that has actually worked per several people on this board, is to put her in a wire dog crate. Do not give her ANY nesting materials, only food and water. After a few days, possible a week, she should get over it and be ready to go back to the flock and start laying eggs again.