Evolution may explain 'Runner's high,' study says

May 09, 2012
Evolution may explain 'Runner's high,' study says
Brain reward center boost seems to spur humans, dogs to run long distances.

(HealthDay) -- The pleasurable feeling known as "runner's high" that's triggered by aerobic exercise may have played a role in the evolution of humans' ability to run long distances, a new study suggests.

Runner's high is caused by the release of chemicals called endocannabinoids in the reward centers of the brain.

The researchers found that levels of these chemicals spiked in the blood of dogs and humans after a brisk run, but did not occur in ferrets after they exercised. Humans and dogs belong to a group of mammals built for endurance while ferrets are a sedentary species, the study authors noted.

In human volunteers, the boost in endocannabinoids after running was associated with an increase in positive .

"Aerobic activity has played a role in the evolution of lots of different systems in the human body, which may explain why seems to be so good for us," study author David Raichlen, an assistant professor of anthropology at the University of Arizona, said in a news release from Eckerd College and the University of Arizona.

"These results suggest that natural selection may have been motivating higher- rather than low-intensity activities in groups of mammals that evolved to engage in these types of aerobic activities," he noted.

The study was published in a recent issue of The .

Explore further: Noted researchers warn that biomedical research system in US is unsustainable

More information: The U.S. Centers for Disease Control and Prevention has more about physical activity.

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verkle
1 / 5 (9) May 09, 2012
Why do we need evolution to explain everything? (of course we don't)

It arises from desperate scientists who want to continue to brainwash others that everything arose spontaneously, and who want to continue to deny that there could even possibly be another explanation for the wonderful world that we live in.

axemaster
5 / 5 (4) May 10, 2012
Why do we need evolution to explain everything? (of course we don't)

It arises from desperate scientists who want to continue to brainwash others that everything arose spontaneously, and who want to continue to deny that there could even possibly be another explanation for the wonderful world that we live in.

Why do we need to assume you're smart? (of course we don't)

These results suggest that natural selection may have been motivating higher- rather than low-intensity activities in groups of mammals that evolved to engage in these types of aerobic activities

Not that surprising given that we evolved bipedal motion in the first place so that we could have our heads up higher and see farther. Next task? Evolve a means to actually reach that thing you see on the horizon. Makes sense.
kevinrtrs
1 / 5 (7) May 10, 2012
Given its current definition or NON-definition, evolution can be used to explain everything. And nothing too.

@axemaster: I guess you haven't spent time thinking about the statements you are making regarding evolution -
Not that surprising given that we evolved bipedal motion in the first place so that we could have our heads up higher and see farther. Next task? Evolve a means to actually reach that thing you see on the horizon. Makes sense.

The way you're putting it clearly spells out "purpose" and "foresight" with a big P and F. According to the nebulous definition of evolution, there just is no such elements involved.

Everything is supposed to be the result of random mutations and natural selection, i.e. without any purpose or foresight. So NOTHING is supposed to make any of the sense you so eagerly want.
So-called "evolution from one ancestor to all of life" clearly defies all the chemical/biological principles established over the past 10 decades. It's non-science.
aroc91
5 / 5 (2) May 10, 2012
Everything is supposed to be the result of random mutations and natural selection, i.e. without any purpose or foresight. So NOTHING is supposed to make any of the sense you so eagerly want.
So-called "evolution from one ancestor to all of life" clearly defies all the chemical/biological principles established over the past 10 decades. It's non-science.


Mutation is random. Selection is not.
axemaster
5 / 5 (2) May 10, 2012
So-called "evolution from one ancestor to all of life" clearly defies all the chemical/biological principles established over the past 10 decades. It's non-science.

Then you clearly either don't understand or have never even bothered to study those principles in the first place. Hopefully you'll try to educate yourself in the future, but I doubt it.
CHollman82
5 / 5 (2) May 10, 2012
Everything is supposed to be the result of random mutations and natural selection, i.e. without any purpose or foresight. So NOTHING is supposed to make any of the sense you so eagerly want.
So-called "evolution from one ancestor to all of life" clearly defies all the chemical/biological principles established over the past 10 decades.


You have no idea what you are talking about. Biological evolution is composed of a random and a non-random component, producing a non-random result. Variation is random through recombination and mutation, selection is not random. Selection serves to promote the continual trend toward higher fitness in the population, that doesn't sound like "random" to me... you are just clueless.

It's non-science


You are not a scientist, you are ignorant of what you speak and your opinion does not matter.

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