Broken Sleep Means Bad Mood
Interruptions during sleep may have a bigger impact on your mood the next day than getting the same amount of sleep over a shorter time, but without interruptions.
Researchers from John’s Hopkins University looked at the sleep habits of 62 healthy people in a hospital sleep lab, assigning them to one of three groups: uninterrupted sleep, delayed bedtimes, or consecutive nights of eight forced awakenings.
After the first night, an emotional assessment was done to evaluate the sleepers’ moods. Those with interrupted sleep or delayed bedtimes reported a low positive mood and a high negative mood.
After the second night, however, the group with the delayed bedtime had a considerably lower reduction in their positive moods (12 percent), compared to the people whose sleep was interrupted eight times (31 percent).
The findings, published in the journal Sleep, suggest that the right combination of sleep quality and quantity is essential for maintaining a positive mood since the delayed sleep group actually got the same amount of sleep as the people who were awakened multiple times.
Other findings showed that the interrupted sleep group had shorter periods of deep sleep compared to the delayed bedtime group.
The findings suggest that people should make an effort to control noise, light, and temperature to ensure fewer disruptions once they go to bed. Also, the researchers noted that after an interrupted night of sleep, a 20-to-40-minute nap during the day could help to improve your mood.