Lack of Sleep
Sleep is a major factor in your mood. If you are sleep deprived you could become more irritable, angry, more prone to stress, and less energized throughout the day. "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."
Read more about this topic: Mood (psychology)
Famous quotes containing the words lack of, lack and/or sleep:
“To be good, according to the vulgar standard of goodness, is obviously quite easy. It merely requires a certain amount of sordid terror, a certain lack of imaginative thought, and a certain low passion for middle-class respectability.”
—Oscar Wilde (1854–1900)
“I leave the governor’s office next week, and with it public life ... [which] has been on the whole a pleasant one. But for ten years and over my salaries have not equalled my expenses, and there has been a feeling of responsibility, a lack of independence, and a necessary neglect of my family and personal interests and comfort, which make the prospect of a change comfortable to think of.”
—Rutherford Birchard Hayes (1822–1893)
“When I sleep I sleep and do not dream because it is as well
that I am what I seem when I am in my bed and
dream.”
—Gertrude Stein (1874–1946)