We are designing an office chair which automatically adjusts to your position. Embedded in the lining on the back of the chair are air tubes which are orientated horizontally. There are sensors fitted to these tubes which which send a signal to a small compressor and solenoids which then allow the tubes to be inflated or deflated independently. The idea behind this is that were you to slouch and round your lower back, the sensors will detect the increased force on the tubes and the compressor will automatically inflate them, this will then correctly align your lower back.

OK