More and more adults are struggling with their sleep, according to a new study published in the journal JAMA Network Open. Researchers analyzed sleep data on over 9,000 Americans aged 20 and older. When looking at sleep debt – or the difference between the amount of sleep you need versus what you get – they found that 30 percent of adults have one hour of sleep debt per night. Roughly 10 percent have a two-hour sleep debt. And almost half of the adults noted what sleep experts call social jet lag – or a difference between someone’s natural biological clock and the hours required at their jobs and schools.