Abstract:
The invention relates to seat belt assemblies, comprising a seat belt (11), a belt buckle, a belt tongue, and at least one sensor region (3) arranged on the seat belt (11), on the belt buckle, and/or on the belt tongue. The at least one sensor region has at least one first sensor (31) and at least one second sensor (33). According to the invention, at least one evaluating unit for determining information regarding the heart activity and/or breathing activity of the user of the seat belt (11) is provided by using the values determined by the first and second sensors (31, 33) of the sensor region (3). The invention further relates to methods for determining information regarding the heart activity and/or breathing activity of a user of a seat belt (11) of a motor vehicle.