06 Dec Sleep and Mood
The Link Between Sleep and Mood
You probably know firsthand that sleep affects mood. After a sleepless night, you may be more irritable, short-tempered, and vulnerable to stress. Once you sleep well, your mood often returns to normal.
Studies have shown that even partial sleep deprivation has a significant effect on mood. University of Pennsylvania researchers found that subjects who were limited to only 4.5 hours of sleep a night for one week reported feeling more stressed, angry, sad, and mentally exhausted. When the subjects resumed normal sleep, they reported a dramatic improvement in mood.1
Not only does sleep affect mood, but mood and mental states can also affect sleep. Anxiety increases agitation and arousal, which make it hard to sleep. Stress also affects sleep by making the body aroused, awake, and alert. People who are under constant stress or who have abnormally exaggerated responses to stress tend to have sleep problems.
Insomnia and Psychological Problems
“There’s a big relationship between psychiatric and psychological problems and sleep. So people who are depressed or have anxiety often have trouble with sleep as part of those disorders,” says Dr. Lawrence Epstein, Medical Director of Sleep Health Centers and an instructor at Harvard Medical School.
Difficulty sleeping is sometimes the first symptom of depression. Studies have found that 15 to 20 percent of people diagnosed with insomnia will develop major depression.2 While sleep research is still exploring the relationship between depression and sleep, studies have shown that depressed people may have abnormal sleep patterns.3
To read full article, visit Get Sleep at med.harvard.edu.