We don’t get injuries from “hunting and gathering” in the field, we get them from “hunting and pecking” at a keyboard.
The human body was built for “hunting and gathering”, not “hunt-and-peck” typing. Our DNA and our evolution is built on movement. However, we now have invented a work form that is virtually movement-free: the modern office.
Constipation, or passing stool with difficulty less than three times a week, is a common reaction to modern stress. This is at first glance curious, because our bodies were hard-wired for centuries for the exact opposite response.
Back pain has become more common in the computer age than it was in the agricultural age. This may appear puzzling, because we are no longer working the land, we are now working the hand. Or at least both hands, at a keyboard.