Tips to protect our joints and muscles of them attacks that cause in them them positions maintained and them overloads of the day to day and that lead to their deterioration and to suffer injuries different. -The Chair should be comfortable and ergonomic,with a back-up compact that includes headrest, adjustable in height and with armrests. We will also use a footrest. -Avoid the incidence direct from the air conditioning on the neck and the back to avoid contractures. -Must set us straight, well to the bottom of the Chair, with the back well supported on the back and the head can also be.