We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
Sedentary workers and sedentary people tend to develop a hunchback, a slouch, termed Postural Kyphosis. This is not really the same thing as Senile Kyphosis ("Dowager's Hump"), but it's in the same direction. Postural Kyphosis is reversible, Senile Kyphosis is not.
Back exercises are the best things for posture, generally. Dead lifts, especially. Not a bad idea to stick a post-it on your desk saying what your Mom said at the dining room table: "Sit up straight with your shoulders back." (She also always said "Stand up straight like a soldier.")
I found that slouching was almost automatic with my desk phone/mouse/keyboard/paper forms configuration. I switched to left-handed mouse and phone which causes my posture to improve equally automatically. I have poor fine-motor coordination, but have still been able to adjust well enough.
Assistant Village Idiot