1. You look exhausted! Try to get some shuteye on the train.

2. 3 You look exhausted! Try to get some shuteye on the train.

3. 6 Roughly one-quarter of the kids fell into the borderline-acceptable category, meaning they reported eight hours of shuteye nightly.

4. 7 The so-called "Bedroom Poll" found that great sleepers get an average of about one hour more shuteye than others.

5. 5 Sleeping in on Saturday after a few weeks of too little shuteye may feel refreshing, but it can give a false sense of security.