For all you artists, gamers and other sitting people out there... This might be worthwile looking at.

To summarise the vid in short... Our body is made for walking and movement and sitting for long periods throughout the day can cause short and long term issues on your body.
In short your brain receives less oxygen because people often sit in a curved posture that lessens the maximum lung capicity. Also your legs can feel numb after a while and you can receive back issues. In the long run all of this can even have serious negative effects on our health, for example our heart, liver and more sensitive to diabetis.

TED-Ed: https://www.youtube.com/watch?v=wUEl8KrMz14

I myself have now piled up boxes on my desk so my tablet is almost the same height as my face while my laptop (keyboard xD) and mouse are now at elbow height. This allows me to stand while working and i use the back of my chair as a way to lean against, instead of sitting on it.