Daytime naps causes dementia doctors warn

Woman taking a nap illustration 
By: Sarah Weiss 

If you are one of those people, who like to take an afternoon nap, you may end up suffering from dementia later on in life.

Experts have found a link between excessive sleep and thinking problems in older people.
Many older people take naps, usually, only because they need a physical break from work, but not because they are tired.

French researchers looked at results of 5,000 people over 65-years-old, and found that 20 percent of people, who regularly took long naps, scored lower on tests of mental ability.

Dr. Claudine Berr from the Institute National de la Santé et de la Recherche Médical (INSERM), told the Alzheimer's Association International Conference in Vancouver: "These results suggest that EDS may be an early indicator of cognitive impairment.”

In another study, also presented in Vancouver, researchers found that regularly sleeping more than nine hours a night, or less than five hours, was linked to lower mental capacity.