One of the main issue is sitting for extended periods of time with no physical activity whatsoever. This is one of the worst position for breathing (compared to

One of the main issue is sitting for extended periods of time with no physical activity whatsoever. This is one of the worst position for breathing (compared to laying down or standing up at least). Unless you're consciously reminding yourself to breathe normally you will default to shallow breathing. Virtually nobody sits 8+ hours a day reading books, writing letter, sewing or cutting veggies