Laughter
really is the best medicine
It might be regarded as a statement of the obvious. But scientists
have proved what everyone else takes for granted – that laughter
really is good for you. It turns out that even the anticipation
of watching a funny video can raise the levels of immune-boosting
hormones in the blood and the benefits can last up to a day.
Lee
Berk of Loma Linda University found that people expecting to watch
a funny movie had 27% more beta-endorphins and 87% more human growth
hormone hurtling around their blood compared with a control group.
He presented his work at a meeting of the American Physiological
Society in April.
“We
believe the results suggest that the anticipation of a laughter
eustress (positive stress) event initiates changes in neuroendocrine
response prior to the onset of the event itself,” said Dr
Berk. “From our prior studies, this modulation appears to
be concomitant with mood state changes, and taken together, these
would appear to carry important, positive implications for wellness,
disease-prevention and most certainly stress-reduction.”
The
researchers studied 16 healthy men, split into two groups. In one
group, the volunteers had chosen a favourite video to watch. All
participants had blood samples taken just before the experiment
began and then during and after the video. The second group acted
as the control experiment.
“One
of the keys in this kind of experiment is to set the baseline and
control environment carefully,” said Dr Berk. “In this
case, the control group basically sits in a neutral room waiting
to have their blood drawn, and on the tables there is a wide variety
of magazines that they can browse, because you don't want to bias
what they do or watch. Time and behaviour have proved me right with
this approach.” The strong difference in hormone levels between
the two groups was maintained from just before the beginning of
video watching, throughout the viewing and afterwards too.
Dr
Berk said that laughter diminished the secretion of the body's stress
hormones, cortisol and epinephrine, while enhancing immune response.
“In addition, mirthful laughter boosts secretion of growth
hormone, an enhancer of these same key immune responses. The physiological
effects of a single one-hour session viewing a humorous video has
appeared to last up to 12 to 24 hours in some individuals.”
Previous
experiments have shown that watching comical videos can offset the
symptoms of long-term stress, a condition that is known to weaken
the immune system's response to viruses and tumours.
Dr
Berk concluded, “It may sound corny, but we in the health
care medical sciences need to get serious about happiness and the
lifestyle that produces it, relative to mind, body and spirit. Why
do you think Reader's Digest has claimed that laughter is the best
medicine for so many years?”
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