The 24-hour darkness during the winter near the Poles can disrupt sleep – this is how the people who live there cope.

"Night owls often struggle against a ... teenagers stay up late and sleep late, and older adults tend to shift back toward a morning preference. Your current body clock may, in part, be a product ...

Females Sleep Less, Awaken More Frequently Than Males ... sluggish and out of sorts after a long-haul flight or a late-night shift? A new study has found that disruptions to our body clock ...

Shift-work sleep disorder affects approximately 5-10% of night-shift workers, and involves excessive sleepiness during night shifts and insomnia when trying to sleep during the daytime.

Research has shown that people with differing sleep schedules, such as night-shift workers and day-shift workers, can have poor sleep if they share a bed, and sleeping with a heavy snorer is more ...

“If you have insufficient sleep over three to four days then try to do a night shift, your ability to cope with that night shift is much more compromised than someone who is sleeping seven to eight ...

Have you ever felt sluggish and out of sorts after a long-haul flight or a late-night ... consistent sleep schedule, particularly in our fast-paced world in which long trips and shift work are ...

Academic demands, after-school jobs, and other activities and obligations can keep teens up late at night. Add to that the natural sleep cycle shift during adolescence, which delays the time teens ...

The reasons people can’t sleep behind bars can vary widely. Sometimes, the prisons are too cold in the winter or too hot in the summer. Sometimes, the lights never go off, or there aren’t any ...