The need to use part of the house as a place of work and study has
increased and, consequently, the time spent sitting at the computer
has increased. Therefore, an important aspect is the position in
which the person is sitting while working or studying. Incorrect
postures can generate fatigue, discomfort and, in the long term,
diseases such as varicose veins, herniated discs and even spinal
deformities. This work consists of prototyping a device to monitor
the position in which the person is sitting and to warn when the
posture is incorrect. The monitoring developed is carried out in the
use of the chair back and seat of the chair. Strain gage were used to
monitor the distribution of load between the sides of the seat and,
on the chair back, reflectance sensors monitor whether the chair
back is being used properly.