SEAT HEIGHT should be adjusted so that feet are flat on the floor or footring with the upper legs angled slightly downward to improve lower body circulation. The torso-to-thigh angle should not be less than 90 degrees.
Adjust the CHAIR TILT of the chair to a reclined posture of 100 degrees to 110 degrees. The neck and shoulders should be relaxed. The lower arms should be +/-90 degree angles, preferably resting on the chair’s armrests so that the wrists are straight.