Feeling short-changed on shut eye? You're not alone.

Short-changed on shut eye? You're not alone, as more than 83 million Americans are now reported to be lacking sleep.

While some may be worried about "sleeping their life away," a new study finds that about one-third of Americans have the opposite problem, snoozing less than the recommended seven hours per night.

And while the resulting drowsiness can contribute to accidents, anxiety, depression and lost productivity, the less immediate health effects raise even greater cause for concern.

“Overtime, lack of sleep alters your hormones and metabolism, increasing your risk for diabetes, obesity, high blood pressure, and heart disease,” says Jeffrey Miskoff, D.O., a pulmonologist at Jersey Shore University Medical Center.

To find out where you and the sandman stand, try keeping a 10-day sleep journal. Be sure to log when you fall asleep and wake up, and include any naps as well. And don't forget to discuss your sleep habits with your doctor.