Young adults can sleep between 7 and 9 hours, as recommended by the National Sleep Foundation, with 6 hours being adequate. It is not recommended to sleep less than 6 hours. Lack of sleep during a single night can increase the emotional response to negative feelings by 60% (. If you think you sleep seven hours a night, as one in three Americans do, it is quite possible that you are only sleeping six.
This is because the amount of sleep a person gets can affect certain hormones, specifically the hormones leptin and ghrelin, which affect appetite. Stimulants such as caffeine, alcohol and even sleeping pills can interfere with your ability to fall asleep and stay asleep. Although some people sleep well on just six hours, most of us would benefit from an extra hour or two of rest. However, some people may need more or less sleep than is generally recommended, depending on the following factors.
In addition, according to the team behind the study, not feeling 100% when waking up after not getting enough sleep may also be due to dehydration, not just lack of sleep, so a glass of water first thing in the morning could make a big difference. Cumulative sleep deprivation is by no means a new concept, but it is rare to find research results that are so clear about its effects. But if you do fall asleep during meetings or exams or at the cinema, consider yourself sleep deprived. Not getting enough sleep, sleeping at odd hours of the day and exposure to bright light at night can disrupt your internal clock and the many processes it regulates.
Older adults should get at least 7 to 8 hours of sleep each night, although 5 to 6 hours is about right for their age. The group that slept six hours seemed to hold out until the tenth day of the study. However, despite this advice, 45 per cent of Americans say that poor or insufficient sleep has affected their daily lives at least once in the past week.