What Your Sleep Style Says About You

August 22, 2014 2:29 PM

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What Your Sleep Style Says About You

Seven -- that’s the average number of hours slept each night by women who scored highest on cognitive tests (reasoning, vocabulary, memory and more). When sleep decreased to six or fewer hours nightly, scores plummet -- especially in reasoning and vocabulary -- and the brain effectively aged by four to seven years, found a five-year study published in the journal SLEEP. While correlation isn’t causation, sleep has restorative properties -- and the habitual seven hours has also been linked with a lower dementia risk later in life.

Surplus sleep is more effective than painkillers -- a surprise discovery by researchers at the Sleep Disorders and Research Center at Henry Ford Hospital. When drowsy people were allowed to sleep for up to 10 hours, four nights in a row, they were 25 percent less sensitive to pain (more effective th...

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