Como ha de ser la silla para dibujar correctamente.

When we have already prepared the table, we will have to choose the seat.
This must be comfortable, without entering in exaggerations, such as an
armchair or a rocker. If you are wondering about what chair to choose: either
fixed or with wheels: Office (those with wheels) provide smaller stability.
When you are drawing, you don't have to move as much as a boss or a manager
in his office does , therefore those seats should not be recommended. The
traditional ones (those with squared legs anchored to the floor) have proved
to be more solid. A wide range exists in specialized centers nowadays. And
finally you could even choose a stool. This will allow to regulate your
height but it does not offers much stability.
It is just question of testing several of them and choosing the one that
one finds better.
If
we maintain the same postures during several hours, our body will finally
feel the effect. A good posture avoids pains and nuisances to take place:
put your back straight , rest your arms lightly on the table and your feet
on the floor.
We have another option apart from resting the feet on the flat floor. We
can use a footrest which will help us to be more comfortable and to maintain
a correct posture while we sit down. We should prevent from placing the
legs folded on the same seat so as not to force our muscles,