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Environment.
"Although the work has been going on for several years, the researchers are still uncertain whether the Green Berets' enhanced capacity to endure trauma was genetic or had been acquired through Special Forces training."
SF soldiers are on average more physically fit than the average. Which in itself may lead to this phenomena being above average.
Comparing soldiers who have been conditioned to extreme physical and mental stress in training, to soldiers who have not had nearly as much experience is not very useful in my opinion.
I believe that responses to stress can be controlled and learned, within reason.
It would be interesting to see how SF qualified soldiers fair against other groups that volunteer and train for working in hazardous conditions, maybe firefighters or something to that effect.
Maybe use 18X'ers or soldiers slated to attend SFAS and see if there is a correlation in the levels of these chemicals before and after SFAS and subsequent training.
I know that 18 series soldiers are elite and deserve all the respect in the world. If you chalk it up to genetic superiority it takes alot away from those guys who have to work twice as hard to wear the beret.
The science involved in the article does not prove or disprove whether it is an environmental or genetic trait though. I think it is most likely a product of the environment 18 series soldiers subject themselves to, especially considering how the approach used in the study.
I will shut up now and return to trawling for information.
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