While some of us may still fight sleep deprivation with caffeine, it 's possible we 're getting tired of being tired.

The urge to keep snoozing can be a clue that sometimes you should stay in bed

Experts say it 's no longer a question: It 's true that exhaustion is reducing America 's workforce to incompetent, unproductive grouches.

Half of the country 's workers say being tired at work keeps them from getting things done, according to a National Sleep Foundation study released on March 28. The study also found that one in four employees often struggles just to get out of bed, and almost half say they intentionally sleep less in order to accomplish more.

And that 's starting to take its toll. "I get grouchy, stressed and cruel," says Raudline Etienne, 34, director of Barra RogersCasey, a Connecticut-based consulting firm. "More time is spent on being resentful than on working."

The news isn 't all bad. As we continue to learn more about how poorly we function when we 're run down, there are signs tired America might finally be listening.

'I 've Had It '

Talking to people about how they sleep (or don 't), it seems most know their limits but choose to push them sometimes for the sake of properly doing their jobs.

Catching Zs on the go might leave you feeling sleepier
"I 'll be in a situation where I 've got to stay on-site until the problem is resolved, and that amount of time is undeterminable," says Jim Cassinelli, an information systems consultant in Connecticut.