Some chairs, like the Herman Miller Aeron or the Steelcase Karman, don't have that much lumbar support as a standard option, but you can configure them online to add an extra brace behind the ...

Similarly, the lumbar support on the entry-level Aeron (what they 'PostureFit') is fixed, whereas the Embody comes with a knob to adjust the level of lumbar support the chair provides. It's worth ...