|How humour (laugh) keeps us well
In particular, laughter has a role in stress hormone reduction, improving mood, enhancing
creativity, pain reduction, improving immunity and reducing blood pressure.-
Hassed C., Monash University, Victoria , How humour keeps you well, Aust Fam Physician. 2001 Jan;30(1):25-8.
Antisocial Type A personality traits may be associated with an increased
incidence of coronary heart disease (CHD). Clark A et al found a significant
inverse association between humor production and antisocial Type A
personality traits from their survey study.
[Int J Cardiol. 2001 Aug;80(1):87-8]
Blood Vessel Functioning
Watching two comedies may be good medicine for the heart because it allows
them to expand and contract more effectively in response to changes in blood
flow. But, watching a mentally stressful movie may cause the lining of the blood
vessels, i.e. endothelium, to narrow and restrict blood flow. It is important to
maintain a healthy endothelium as it is the first line in the development of
atherosclerosis. The researchers suggest laughing may reduce the risk of
[Michael Miller, University of Maryland Medical Center , Scientific Session of the
American College of Cardiology, Orlando, Florida, March 7, 2005]
Kimata H., Ujitakeda Hospital, found that laughter caused by viewing a comic
video reduced the plasma nerve growth factor, neurotrophin-3 levels, and
allergic skin wheal responses in patients with atopic dermatitis. While, writing
mail on a mobile phone caused stress and enhanced allergic responses.
[Behav Med. 2004 Winter;29(4):149-52]
Stress Management and Body Defense
Laughter may reduce stress and improve NK cell activity. As low NK cell activity
is linked to decreased disease resistance and increased morbidity in persons
with cancer and HIV disease.
[Bennett MP et al , Indiana State University School of Nursing, Altern Ther
Health Med. 2003 Mar-Apr;9(2):38-45]
NEWS-April 18, 2005
Researchers found that people had an increase in plasma fibrinogen and
saliva cortisol (a stress-related hormone taht increases the heart disease and
diabetes risk) during mental stress tests.
Happiness May Bring Better Health, MedMD, April 18, 2005
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