What do you mean?
Flatback Syndrome is not good either
This is just one more aspect of the conspiracy to make humans chronically sick. I came to this posture thing from the angle of yoga, where for thousands of years it has been stressed that the spine must be straight and posture perfect to achieve samadhi. In modern times i know only of esther gokhale that talks about this, you can look up her lectures on youtube.The change in spine depiction from a 1911 textbook (right) to a 1990 one (left) shows that if we travel back in time just a hundred years, straighter spines were thought to be more natural.
In fact, if you look at drawings from Leonardo da Vinci — or a Gray's Anatomy book from 1901 — the spine isn't shaped like a sharp, curvy S. It's much flatter, all the way down the back. Then at the bottom, it curves to stick the buttocks out. So the spine looks more like the letter J.
The recent Kebara 2 Neanderthal find (nicknamed “Moshe”), with very well-preserved vertebrae and ribs, was a particularly exciting find (link is external). Patricia Kramer, professor and chair of anthropology at University of Washington, has created a 3-D image deducing what the shape of Moshe’s thorax must have been, and there are some surprises. One surprise is especially interesting: the Neanderthal lumbar spine was practically straight! This was a great surprise to the researchers since they were expecting that Neanderthals, who are quite closely related to our species, would surely have the same lumbar spine shape as ours. The researchers’ starting point is the conventional understanding that modern human spines have a considerable amount of curvature throughout the lumbar area. So discovering that the Neanderthal lumbar spine is straight was shocking to them. For those who subscribe to the basic tenets of the Gokhale Method, though, discovering that the Neanderthal lumbar spine is straight is not so shocking. It reaffirms that our close relatives, the Neanderthals, have a similar lumbar spinal shape to what’s actually natural to us (as the researchers would have expected); it also adds to our conviction that the paradigm of the S-shaped human spine is overdue for an overhaul to the J-spine paradigm.