The median American adult falls asleep at 11pm and wakes at 6:30am on weekdays. We pulled the CDC's survey data to see how that shifts by age and on weekends.

We ran the numbers on the CDC's national sleep survey. Adults sleep 41 minutes longer on weekends, and those who need the catch-up most get the least.

We analyzed the CDC's sleep survey for 9,693 adults. Reported trouble sleeping doubles from the twenties to the fifties, and sleepiness tracks hours slept.

We analyzed the CDC's sleep survey for 9,170 adults. 23.9% report gasping or breathing pauses at night, and they are twice as likely to be sleepy all day.

Federal survey data shows most adults are only about one glass short of the recommended intake, but some groups are three glasses short every day.

Urine tests in a national survey found 32.6 percent of adults under-hydrated, about 63 million people. Most feel it as fatigue, not thirst.