Fuente: Wipo "Sensorization" This invention is a system which automatically changes the firmness and/or configuration of a portion of a mattress on which a person sleeps based on changes in the person's body motion, body configuration, and/or snoring. The person's body motion or body configuration can be measured by a wearable motion sensor. The firmness and/or configuration of the portion of the mattress can be changed by inflation or deflation of the mattress or by electromagnetic adjustment of the compressive resistance of mattress springs.