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For other uses, see Middle Ages (disambiguation).

Middle age is the period of age beyond young adulthood but before the onset of old age. Various attempts have been made to define this age, which is around the third quarter of the average life span of human beings.

Definitions[edit]

According to Collins Dictionary, this is "... usually considered to occur approximately between the ages of 40 and 60".[1] The current edition of the Oxford English Dictionary gives a similar definition but with a shorter span: "The period of life between young adulthood and old age, now usually regarded as between about forty-five and sixty." The US Census lists middle age as including both the age categories 35 to 44 and 45 to 54, while prominent psychologist Erik Erikson saw it ending a little later and defines middle adulthood as between 40 and 65. The Diagnostic and Statistical Manual of Mental Disorders, the standard diagnostic manual of the American Psychiatric Association, used to define middle age as 40–60, but as of Edition IV (1994) revised the definition upwards to 45–65.

Aging[edit]

Middle-aged adults often show visible signs of aging such as loss of skin elasticity and graying of the hair. Physical fitness usually wanes, with a 5–10 kg (10–20 lb) accumulation of body fat, reduction in aerobic performance and a decrease in maximal heart rate. Strength and flexibility also decrease throughout middle age. However, people age at different rates and there can be significant differences between individuals of the same age.[2]

Both male and female fertility declines with advancing age.[3][4] Advanced maternal age increases the risk of a child being born with some disorders such as Down syndrome. Advanced paternal age significantly increases the risk of miscarriage, as well as possibly slightly increasing the risk of Down syndrome, schizophrenia, autism, decreased intellectual capacity, and bipolar disorder.[5][6][7][8] Most women will experience menopause, which ends natural fertility, in their mid 40s or early 50s.[9][10] However, fertility in women starts to decline in the 20s. Ten years before menopause, fertility is already very low.

In developed countries, yearly mortality begins to increase more noticeably from age 41 onwards, mainly due to age-related health problems such as heart disease and cancer.[11][12] However, the majority of middle-age people in industrialized nations can expect to live into old age. Life expectancy in developing countries is much lower and the risk of death at all ages is higher.[11]

See also[edit]

Notes[edit]

  1. ^ middle age. CollinsDictionary.com. "Collins English Dictionary" - Complete & Unabridged 11th Edition. Retrieved December 05, 2012.
  2. ^ Shephard, Roy J. (7 March 1998). "Aging and Exercise". Encyclopedia of Sports Medicine and Science (T.D.Fahey). Retrieved 2007-06-26. 
  3. ^ Rabin, Roni (2007-02-27). "It Seems the Fertility Clock Ticks for Men, Too". The New York Times. Retrieved 2009-10-16. 
  4. ^ Fertility Treatment Less Successful After 35: In Vitro Fertilization Doesn't Compensate for Decreased Fertility With Age
  5. ^ Heubeck, MA, Elizabeth; Reviewed By Brunilda Nazario, MD (2005-06-29). "Age Raises Infertility Risk in Men, Too: Risks associated with men's biological clocks may be similar to women's.". WebMD. MedicineNet. Retrieved 2009-10-16. 
  6. ^ "Miscarriage significantly associated with increasing paternal age". Columbia University's Mailman School of Public Health. 2006-08-03. Retrieved 2009-10-16. 
  7. ^ Raeburn, Paul (February–March 2009). "The Father Factor: Could becoming a father after age 40 raise the risks that your children will have a mental illness? (PDF)". Scientific American Mind: 30–33. Retrieved 2009-10-16. 
  8. ^ Cannon, Mary (2009-03-10). "Contrasting Effects of Maternal and Paternal Age on Offspring Intelligence". Public Library of Science. Retrieved 2009-10-16. 
  9. ^ BBC - Health: Menopause
  10. ^ Cannon, Mary (2003-06-26). "Male Biological Clock is Ticking, Too". WebMD Health News. Retrieved 2009-10-16. 
  11. ^ a b "Life Expectancy Profiles". BBC. 6 June 2005. Retrieved 2007-06-26. 
  12. ^ "UK cancer mortality statistics by age". Cancer Research UK. May 2007. Retrieved 2007-06-26. 

References[edit]

External links[edit]

Preceded by
Young Adult
Stages of human development
Middle age
Succeeded by
Old age

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Middle_age — Please support Wikipedia.
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Now, a study found that regular physical activity might also help the brain function better as it reaches middle age. “This study is yet another reason to live a very good lifestyle," said David Jacobs, an epidemiologist at the University of Minnesota ...
 
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Thu, 23 Oct 2014 22:03:45 -0700

For years I have been telling my readers about all the good things about being Middle Age Plus. I have insisted that it wasn't being old, just becoming a little past middle age. Using middle as a synonym for half, I figured that if you were 50 or older ...

Telegraph.co.uk

Telegraph.co.uk
Mon, 06 Oct 2014 23:28:41 -0700

John Lawson, head of retirement at insurer Aviva, who conducted the research, said: "In the past, people were accustomed to receiving inheritances earlier in middle-age, providing parents with money to help their children fund the cost of university ...
 
Huffington Post
Thu, 16 Oct 2014 11:22:30 -0700

When it comes to anti-aging, prevention is the best cure. Some experts say prevention begins as early as your 20s, with proper sun protection and a personalized skincare regimen. But now that we're in our 50s, it's more about maintenance than turning ...

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Wed, 08 Oct 2014 09:28:43 -0700

We've all heard it before. Breaking out of a sedentary lifestyle is critical to good health. This can be an even more challenging feat for those of us in our middle years (anywhere from age 40 to 60), who can be pretty set in our ways. As a husband ...

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Wed, 01 Oct 2014 05:13:27 -0700

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Thu, 02 Oct 2014 15:53:49 -0700

And now along comes another thought to frighten us neurotics out of our wits: those who worry a lot in middle age, finds a study this week from the University of Gothenburg, are twice as likely to develop Alzheimer's as people who take life in their ...
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