I watch quiz shows on TV where teams compete and each member of a team has to answer a question when it is their turn.
On the show, the presenter wants each member of the team to come on the stage one at a time and asks each of them a different question. And the presenter calls the name of the next member of the team when it is their turn like this: "James, you are up next".
I understand by "up next" the presenter means "James, now it is your turn to come to stage and answer the next question."
But I wonder why does TV presenter say "UP NEXT", where simply "NEXT" would do?
Shortly, is there any difference between "you are next" and "you are up next"?