A health & fitness tracking device may include a display that provides fitness information to a wearer of the health & fitness tracking device, at least one physiological sensor that obtains physiological data by monitoring at least one physiological condition of the wearer, at least one environmental sensor that obtains environmental data by monitoring at least one environmental condition, a data storage device that stores the physiological data, the environmental data, and medical history data relating to the wearer, a memory storing a computer program, and a processor that executes the computer program. The computer program may adjust a sensor configuration of the at least one physiological sensor based on the medical history data.