By the end of a long day, he said, the extras sometimes get too tired to cheer.

WSJ: Extra Work for Little Pay

"Sometimes he was tired and lethargic and had to be, not convinced, but supported throughout rehearsals, " Payne said.

CNN: SHARE THIS

It's normal for new mothers to feel overwhelmed and tired, but sometimes those feelings can develop into something more serious.

CNN: Postpartum depression: When moms feel out of control

It wasn't just a matter of demonstrating with placards and wearing George Davis T-shirts, though she did all that, even spelling his name wrong sometimes, she was so tired.

ECONOMIST: Rose Davis

Now, you know, sometimes on a journey you get tired, and there will be voices that whisper in your head to be cynical, to think you can't make it.

WHITEHOUSE: The White House

Ofri, an assistant professor of medicine at New York University Medical School, says when patients complain about being tired, for example, she'll sometimes suggest they take a multivitamin, even though there's no proof they work against fatigue.

CNN: Is your doctor prescribing a placebo?

The debate over the merits of these sorts of online awareness raising campaigns, sometimes referred to as "slacktivism" or "clicktivism, " is getting tired.

CNN: In praise of 'slacktivism'