A dynamic ergonomic chair with a sensor detects an adjustment to a position of a component of the chair and includes a user interface which updates a first user profile based on the detected adjustment to create a second user profile. The second user profile including a second workstation productivity measurement; the interface compares the first workstation productivity measurement of the first user profile with the second workstation productivity measurement of the second user profile, and/or medical outcomes, to determine an optimal user profile. The chair can dynamically adjust various components (e.g. armrest, recline angle, etc.) to enhance worker productivity.