Adults over 18 need at least seven hours of solid sleep at night to be healthy. When they fall short of that minimum, the consequences could be severe: Studies have linked poor sleep to an increased risk of obesity, heart disease and dementia. Despite the risks, more than 30% of adults have a daily sleep debt — when you sleep less than your body needs — of over an hour, while nearly 1 in 10 adults are missing two or more hours of sleep each night, a 2022 study found.
Recently, a new study analyzed data from 154 studies on more than 5,000 people across five decades. In those studies, researchers disrupted the sleep of participants for one or more nights, either by keeping them awake (sleep deprivation), waking them periodically (sleep fragmentation) or making them get up earlier than usual (partial sleep loss). Afterward, participants were tested for anxiety, depression, mood and their response to emotional triggers (触发因素).
“We found that all forms of sleep loss — total sleep deprivation, partial sleep loss, and sleep fragmentation — resulted in emotional changes. The strongest and most consistent effect was that sleep loss reduced positive mood,” said co-lead author Cara Palmer. “We also found that sleep loss increased feelings of anxiety,” he said. “When experiencing emotional events, people were also more likely to report reacting differently than people who were well-rested.” “Generally, total sleep deprivation had a larger impact on mood and emotions compared to partial sleep loss or fragmented sleep,” Palmer added. “Interestingly though, the effect of sleep on positive mood occurred even after short periods of sleep loss, like staying up an hour or two later than usual or after losing just a few hours of sleep.”
Sleep specialist Dr. Raj Dasgupta, who was not involved in the research, said, “Maybe there is truth behind the saying: ‘ ▲ ’. Studies included in the ‘large and comprehensive’ analysis found that subjects who had poor quantity and quality sleep reported feeling more stressed, angry, sad, and mentally exhausted. When the subjects resumed normal sleep, they reported a dramatic improvement in mood.”
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