Which is caused by the bad cultural ideas in the first place. Ideally, people should almost never sit (on the chairs at least, yogic sitting postures are Ok once mastered). Maintaining the right posture while standing for whole days is hardly possible for most of the people too. People should mostly lay while using computers + walk for at least an hour + have about 20 minutes (see the "The First 20 Minutes" book by Gretchen Reynolds for scientific references) of high-intensity exercising and there will be no back pain. Sitting is what killing us. Whenever I don't have to go to the office I do my coding laying on the floor an feel a way better. Sadly, I've never seen an office where you would not be meant to sit.
How exactly do you code while laying on the floor? Do you prop your back up at a slight angle with a cushion or something? How is your laptop secured on your lap?
I lay on my stomach (that's what I meant, not on my back) with a hard foam roller + 2 cushions under my chest with the laptop on the floor in front of me (not on my lap).
That is not a perfect set-up, however - my neck and shoulders still hurt occasionally this way. The perfect set-up looks like this: https://imgur.com/a/tmvxHRK or this: https://imgur.com/a/Ej2EY2n - this is how spinal surgery and scoliosis patients study in Russia and Ukraine.
Besides healthy back feeling, effects I experience while working this way include increased energy, decreased appetite and better, more enthusiastic mood (kind of like on ADHD meds - feels like it boosts dopamine or something).
As for laying on your back - it sounds funny but the most comfortable set-up I've ever sat in was a stomatology chair (thank's G-d I have healthy teeth and don't have to be afraid of it :-)) - put a big monitor in place of the lamp, invent a comfortable way to place the keyboard and I'm not leaving it voluntarily :-)
