Under league rules, a team can only call one time out between plays.

There are various ways in which researchers may choose to look at the differences between work and play.

"I have to find the right match between plays and people," she said.

But there's not a big difference between play and work.

At 25, Beth had struck a balance between work and play.

I don't have a sharp sense of the difference between work and play.

Between plays and in the locker room, Anderson walked like a man of 62, not 32.

Forty years of research has shown positive correlation between play and children's learning.

And there needs to be a balance between work and play.

A timer used to increase the pace of the game between plays.