7.7.1 Detecting seated posture in a chair

Ergoniza Intelligent considers the model to be seated in a chair under two circumstances. The first is a condition explicitly defined by the user by activating seated posture with the Seated button on the left side of the interface. The second uses automatic detection based on the posture of the body segments, allowing the program to identify configurations consistent with conventional sitting.

Automatic seated-posture detection can be enabled or disabled under Model settings on the right side of the interface. An explicit definition made with the Seated button takes precedence over automatic detection when both are enabled.

When the Seated button is not active and automatic detection is enabled, Ergoniza Intelligent analyzes the configuration of the pelvis, torso, and lower limbs. A pelvis and torso position consistent with sitting, together with flexion of both hips close to a right angle, allows a conventional seated posture to be identified automatically.

As part of this automatic procedure, if the program detects bilateral hip contact with the floor, it classifies the posture as seated on the floor rather than seated in a chair. Thus, two postures with similar angular configurations but different support conditions can be treated using different mechanical models. If automatic detection is disabled and the Seated button is not active, the program will not automatically classify the posture as seated.