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:
“Today I begin to understand what love must be, if it exists.... When we are parted, we each feel the lack of the other half of ourselves. We are incomplete like a book in two volumes of which the first has been lost. That is what I imagine love to be: incompleteness in absence.”
—Edmond De Goncourt (1822–1896)
“Once one is caught up into the material world not one person in ten thousand finds the time to form literary taste, to examine the validity of philosophic concepts for himself, or to form what, for lack of a better phrase, I might call the wise and tragic sense of life.”
—F. Scott Fitzgerald (1896–1940)
“And wow he died as wow he lived,
going whop to the office and blooie home to sleep and
biff got married and bam had children and oof got fired,
zowie did he live and zowie did he die,”
—Kenneth Fearing (1902–1961)