A survey of Americans found that we lose this much sleep per day during the holidays.
Sleep quality was found to impact women's moods and views on career advancement but not men’s.
The new study found high levels of melatonin suppression following exposure to all types of light, including dim ones.
The average American takes over two and a half days to adjust after the clocks change.
The findings will offer new ideas to help those suffering from mental health problems.
"We observed a fast decrease of nightmares, together with dreams becoming emotionally more positive."
“Sleep is so important for my overall health and performance, both on and off the court, so I never compromise on my rest."
The risk of being admitted to a nursing home increased by 19 percent with every unit decrease in healthy lifestyle score.
“Counting sheep is more than an old wives’ tale - it’s a tried-and-tested visualization technique.
“The differences in fat metabolism between ‘early birds’ and ‘night owls’ shows that our body’s circadian rhythm (wake/sleep cycle) could affect how our bodies use insulin."