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On “We have an epidemic of bad posture”
I haven't read all the other comments so not sure if this has been mentioned already. The modern concepts of posture may be wrong. I have a curved butt to shoulder area. It makes me look somewhat duck like. However, I never have any back aches etc. I know of people who are straight as a plank, and complain constantly of aches and pains. This TED talk will explain why curved is better than straight: link to this video