Social jet lag: Need a smoke?

From Munich, at the Euroscience Open Forum meeting

People who have a hard time waking in the morning because their bodies’ internal clocks are out of sync with their sleep schedules are said to have “social jet lag.” Researchers in Europe have determined that the phenomenon strongly correlates with smoking.

Battling one’s biological clock can leave people weary in the same way as traveling across several time zones can, says Till Roenneberg of Ludwig-Maximilian University in Munich.