A wearable posture monitoring and feedback system and related method configured to monitor and provide feedback regarding a user's posture while operating and viewing a portable electronic device includes: a wearable frame configured to be fit on or about a head of the user; a sensor mounted on the wearable frame configured to monitor at least a head position of the user; and a transmitter configured to transmit data related to at least the head position wirelessly from the sensor to a receiver on or in the portable electronic device. The system is configured to (1) provide feedback to the user based on the data from the sensor; and (2) send a signal to alter an output provided to the user by the portable electronic device based on the data from the sensor.