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.

Dr. Ash on Steve Harvey Show: Biggest Mistake Made by People Seeking Sound Sleep

What is the NUMBER ONE mistake made by people in their efforts to get a better night's sleep? On a recent visit to The Steve Harvey Show, Meridian Health Director of Sleep Medicine Dr. Carol Ash answers this question - and helps a woman who hasn't had a full night's rest in more than five years!

Inadequate Sleep Detrimental to Teens' Physical and Mental Health

This year the American Academy of Pediatrics came out in support of delaying the start of the school day for older students to allow teenagers to get more sleep.

As reported in the Asbury Park Press, New Jersey State Senator Richard Codey supports the recommendation, announcing a bill last week that would direct the state Department of Education to study the benefits of delaying school start times.

“Studies are showing that our current school start time is flipped the wrong way,” Codey said. “Middle and high school start times are too early, and elementary and pre-k classes are too late.”

Lack of sleep is detrimental to mental health, making adolescents more prone to automobile crashes and hindering their academic and athletic performance, according to Dr. Carol Ash, director of sleep medicine at Meridian Health.

The physiology of teenagers makes it difficult for them to fall asleep quickly, she adds. Teenagers naturally require more time than adults to "wind down" before falling asleep, and distractions such as cell phones and television only exacerbate the problem.

Improve Mind, Body and Relationship By Sleeping Separately

He likes it cold; she likes it hot. She's a mover and a shaker; he's down for the count.

Opposites may attract, but when it's time to call it a night, some differences come at a cost.

It sounds extreme, but on an episode of "The Doctors," Dr. Carol Ash discussed how sleeping separately from your partner could provide a healthier night's sleep all around.

Dr. Ash discussed findings from a study that found people who sleep alone tend to get a better night's sleep - as over 50% of those surveyed blamed their mates for their sleep disturbances.

Researchers add that relationships and overall health can improve dramatically when couples opt to sleep separately.

So what does Dr. Ash have to say? Is "divide and conquer" an option worth considering for couples not getting adequate sleep?
 

 "We think of sleeping apart as taboo and something we should never do," Ash says. "But the truth of the matter is, sleep is so important,  if that is what you have to do to get a good night's sleep, then, yes, it is."

Watch the full segment below and decide for yourself.

Dr. Ash helps answers the question, "Why am I so tired?"

It's a question we've all asked ourselves: "Why am I so tired?"

On a visit to TODAY earlier this year, Dr. Carol Ash and Julie Bain, Health Director for Ladies Home Journal, offered tips to help provide answers to that question.

Both Ash and Bain agreed that mental fatigue and stress can be one of the biggest causes of daytime sleepiness.

"Stress is a good thing; it helps us overcome challenges," Ash said. "But sustained stress can lead to anxiety and depression."

These types of stress can keep you awake at night - and exhausted during the day.

Ash advises, when stress and anxiety are keeping you up, write it down, and then confide with someone you trust during the day.

Watch the full TODAY segment below.