Background: The aim of the study was to determine the parameters of the postural changes between two sitting positions: sitting on a saddle chair compared to sitting on an office chair.
Objective: The aim of the study was to determine the impact of an adjustable saddle chair compared to an adjustable office chair with a backrest on sitting posture.
Methods: The study involved 60 healthy subjects, mean age 24.7±2.3 years. The study used a MORA 4G system, operating on the basis of spatial photogrammetry.
Results: It was found that there were statistically significant differences regarding the depth of thoracic kyphosis and the angle of the trunk forward inclination. These values were lower when measured on a saddle chair, and the inclination of the upper thoracic section and the lumbar lordosis depth were significantly higher when sitting on a saddle chair.
Conclusions: Sitting on the saddle chair caused the positive effect of an increase of lumbar lordosis. A significant increase in the protraction in the cervical spine was observed, which would be considered to be a negative effect.
Keywords: Physiotherapy; ergonomics; posture; prophylactic; sitting position.