I feel incredibly lucky that I don't suffer from any of these symptoms, as I sit, and have sat, in front of my computer for ~14 of my available waking hours eac

I feel incredibly lucky that I don't suffer from any of these symptoms, as I sit, and have sat, in front of my computer for ~14 of my available waking hours each day for the past... 10 years? 8 hours a day at work, and I then come home and game for 3 or 4 more, sometimes as much as 9 or10 additional hours, and have not yet felt anything as described here. I may do these exercises naturally, as part of my existing habits, because I'm fairly easily distracted.