Feeling older than your actual age could be a sign that you're not getting enough quality sleep, according to new research.

A study led by researchers at the National Sleep Foundation and published in the journal Sleep found that adults who felt older than their chronological age were more likely to report insomnia symptoms, irregular sleep patterns and daytime fatigue.

The study involved more than 3,100 adults, who were asked a simple question: "How old do you feel?" HERE'S WHY 90% OF AMERICANS DON'T SLEEP THROUGH THE NIGHT, ACCORDING TO EXPERT Researchers then compared participants' answers with measures of sleep quality, sleep consistency and daytime functioning.