Posture
Posture is not about holding a static position and sitting up straight.
Although we tend to think of posture and movement as distinct entities, posture in fact consists of constant subtle movement. Movement and variation helps maintain comfort, balance, and preparation for whatever movement comes next. The better you move, the better you can just sit and relax.
Here are some articles on posture, several of which challenge some common myths, including that static posture is a major cause of pain, or that it requires sucking things in, pinching things back, or holding different body parts in place.
Moshe Feldenkrais said that to "correct is incorrect." He was referring to efforts to correct someone's movement patterns. Which is kind of a strange thing to say for a guy whose method was largely about making people's movement more efficient. What did he mean and what does this say about efforts to correct movement? I think his message is that it is preferable to show clients different options or choices for how to move, than to tell them their current movements are wrong and require correction.
Excessive sitting will shorten your hip flexors. I have read this sentence many times. What I have never read is a citation to supporting evidence at the end of the sentence. It’s one of those claims that no one ever questions, like you should drink eight glasses of water a day. Let’s see how it stand up to some critical inquiry....
The idea that posture causes pain has intuitive appeal, and is advocated by numerous experts. But is it supported by evidence? And should you spend time trying to analyze your own posture and correct deviations from what is considered optimal?