The latest poll on U.S. sleep habits finds everyone is sleeping less.
The U.C. San Diego survey of 1,000 adults found that people sleep almost two hours less than they did 40 years ago and it is taking a toll on daily living.
Up to 24 percent say they have missed work or social engagements because they were too tired.
U.C. San Diego researchers say sleep duration is a very important variable in health -- especially cardiovascular health.
They recommend eight and half hours a night.