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Even if you have an ergonomic desk chair, you must adjust it properly to achieve the best ergonomic seating for your physical proportions.
Use this elbow measurement to help: Sit close enough to your desk for your arms to be in line with your torso, and your elbows should be bent at a 90-degree angle when your hands are resting on your work surface, either your desk or your computer keyboard.
|Jennifer Mathes, Ph.D.|