A device for detecting an unacceptable deviation from a neutral spine position in a user is provided. The device is configured to determine changes in orientation and curvature of the user's back, and comprises a first sensor configured to determine the change in orientation, a second sensor configured to determine the change in curvature, a signaling mechanism configured to issue an alert to the user, an attachment element configured to maintain the device on the user, and a controller configured to determine that an unacceptable deviation has occurred based on readings of the first and second sensors.
