09 AUG 2014 by ideonexus
Did Lower Testosterone Help Civilize Humanity?
A new study appearing Aug. 1 in the journal Current Anthropology finds that human skulls changed in ways that indicate a lowering of testosterone levels at around the same time that culture was blossoming.
“The modern human behaviors of technological innovation, making art and rapid cultural exchange probably came at the same time that we developed a more cooperative temperament,” said lead author Robert Cieri, a biology graduate student at the University of Utah who began this work as a sen...Folksonomies: human evolution anthropology
Folksonomies: human evolution anthropology
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notes22 NOV 2013 by ideonexus
Stress is Healthy
Your heart might be pounding, you might be breathing faster, maybe breaking out into a sweat. And normally, we interpret these physical changes as anxiety or signs that we aren't coping very well with the pressure.
But what if you viewed them instead as signs that your body was energized, was preparing you to meet this challenge? Now that is exactly what participants were told in a study conducted at Harvard University. Before they went through the social stress test, they were taught to ret...
2 At least it can be, if we don't think of it as being detrimental. If we don't stress about stress, but rather think of it as healthy reaction and seek social connections as a coping mechanism for it, then stress is good for us.
Additional Note: Could this be why parents have longer lifespans? The oxytocin response tempers the detrimental effects of stress, leaving only the beneficial?
19 JUL 2011 by ideonexus
Exercise During Pregnancy
There are two main reasons for concern about exercising during pregnancy. One is that it may reduce the baby's oxygen supply, since exercise, like other sources of stress, reduces blood flow to the uterus. Another risk is overheating. As we have already seen, fetal development is highly sensitive to temperature, and elevations of more than 2^0 C (or above 1020F) can increase the risk of miscarriage and affect the formation of the brain and eyes.
Despite these theoretical concerns, there is ...There are some concerns about the mother exercising during pregnancy, but the benefits appear to outweight the potential deleterious effects and have no apparent effect on the child's IQ.
