Seven hours of sleep just right

Washington:  People who sleep more or less than seven hours a day, including naps, are increasing their risk for cardiovascular disease, the leading cause of death in the United States, a study published on Sunday showed.

Sleeping fewer than five hours a day, including naps, more than doubles the risk of being diagnosed with angina, coronary heart disease, heart attack or stroke, the study conducted by researchers at West Virginia University's (WVU) faculty of medicine and published in the journal Sleep said.

And sleeping more than seven hours also increases the risk of cardiovascular disease, it added.

Study participants who said they slept nine hours or longer a day were one-and-a-half times more likely than seven-hour sleepers to develop cardiovascular disease, the study found.

The most at-risk group was adults under 60 years of age who slept five hours or less a night.

People in this group increased their risk of developing cardiovascular disease more than threefold compared to people who sleep seven hours.

Short sleep duration was associated with angina, while both sleeping too little and sleeping too much were associated with heart attack and stroke, the study revealed.

How many hours of sleep do you get every day? Do you think most behavioural issues seen in offices area  result of people with lack of sleep?