How do I adjust an office chair correctly?

Start with seat height: stand in front of the chair and adjust so the seat top is at kneecap level, then sit down — feet should be flat on the floor. Adjust seat depth so 2–3 fingers fit between the seat edge and back of knee. Set lumbar support to contact your lower back curve. Adjust armrests so your shoulders are relaxed and forearms are horizontal at keyboard height. Finally, check backrest angle — a slight recline (100°–105°) is more ergonomic than bolt upright. FindOfficeFurniture.com has properly adjustable commercial office chairs — call 888-719-4960.