What exactly are the elements involved in design and creation of a completely ergonomic office chair? The premier design element that substantiates the chair as ergonomic has got to be lumbar support. This simple wall of adjustable foam can make the difference between having a worn out and tired back at the end of the day or feeling rested from being seated. Other important ergonomic chair elements are adjustable armrests and a synchronized seat bottom and seat back adjustment. Earlier developments which have existed in office chairs for years such as adjustable seat height are actually ergonomic elements as well.