I think we all need this. My posture gets really messed up after an hour of sitting down. The negative effects of bad posture go from neck pain,shoulder pain, chest pain to more serious things like muscle atrophy (in my case I have fucked up abs, teres majors, posterior deltoids and perhaps my lats too). Now I have a mild case of anterior pelvic tilt which I'm working on fixing rn.
Also it will affect us even harder in some years. So take a minute and fix your posture or take more time and stretch a bit or do some exercisesto avoid major problems, here are some links and vids that will help you out: