For others there is a sense of joy or peace as endorphins are released.
"The thought centers around the release of mood-altering brain chemical, mainly endorphins, " Bryant said.
Acupuncture appears to work by releasing endorphins, the body's natural pain-killers, into the system.
Laughter also raises the level of serotonin in the brain and in addition, produces endorphins.
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And it can be rather painful so the endorphins should be out in droves.
You also feel great afterwards thanks to endorphins and other assorted brain chemicals triggered by the laughter.
More of the tracer was floating around unbound, suggesting the receptor sites were occupied by the endorphins.
Scientists theorize the body releases endorphins to help us cope with the discomfort.
My endorphins had skyrocketed, my esteem had peaked, and I felt calm.
Endorphins are the brain chemicals that make us feel relaxed and happier.
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Because it activates pain receptors, capsaicin releases pleasure chemicals called endorphins.
The day drained out of her and endorphins filled her floodplains.
Oxford University evolutionary psychologist Robin Dunbar explained to the Times earlier this year that the muscular movements involved in producing chuckles cause a spike in endorphins.
Hunting an animal may be tiresome but necessary, so endorphins are secreted during exertion to numb the discomfort induced by lactic acid production in the muscles.
There's even science to back up that claim: Studies have discovered that when fat is on the tongue the body releases endorphins, which creates an elated mood.
Now, researchers have found that eating chocolate, the number one food craved by American women, causes the brain to release endorphins, chemicals that make us feel good.
The researchers knew this because they had introduced a radioactive tracer that selectively binds to the same type of receptor in the brain, the mu-opioid variety, as the endorphins.
The urge to drink or take drugs is, neurochemically speaking, linked to endorphins (natural morphine-like molecules) or dopamine, a neurotransmitter that is involved in bits of the brain that control reward behaviour.
Ann Kelley of the University of Wisconsin, for example, has shown that giving calorie-packed chocolate Ensure, a diet supplement, to rats rapidly reduces pleasure-inducing endorphins, an effect also seen in rats that have been given narcotics.
An international research team at Oxford University found that when people laugh hard, the kind that leaves them almost physically exhausted with tears in their eyes, the human body triggers the release of endorphins that help reduce the feeling of pain and promote feelings of general well being.
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