You will not be able to benefit from these instructions unless you know how to adjust your chair and workstation. If you are unfamiliar with the controls, consult your Health & Safety Advisor or furniture supplier. - Avoid sustained static postures. Remember that even appropriate postures become inappropriate when maintained for too long.
GSS. With a sit-stand desk, stand upright with your legs apart and slightly bent with one foot marginally in front of the other. Your elbows should be level with the desk. It may be necessary to raise or tilt the monitor slightly to align it in the way described in G3 in order to avoid tipping your head forward. Be sure to mix sitting and standing. 5 to 6 minutes of standing for 30 minutes sitting is recommended.
BSS. It is too easy to just replace a static sitting posture with a static standing posture! Many users set the desk too low for standing height. As a result, they slouch forward and then tilt their head up (especially those using varifocal spectacles). This creates the classic (and very uncomfortable) ‘vulture neck’. Many people also lock their knees which restricts blood flow.