Mother gravity will all bring us in the same direction which is this, which is a backwards rotation of the
pelvis. So, to sit properly I need pelvic support to get that I need a strong push from the feet
that will bring me at the back of the chair where the pelvis will meet the lower part of the
backrest called the "lumbar support". This lumbar support needs to be adjusted at belt height and
from there you see that my shoulder blades will always be off the backrest as well as the head
from the headrest the rest of the adjustment is simple: you put your keyboard where your hands
are and your screen where your eyes are..
