Abstract: A body movement feedback system including at least one position sensor operative to sense at least relative positions of mutually articulated body portions of a user in real time and providing sensor outputs, a mutually articulated body portion position processor, receiving the sensor outputs of the at least one position sensor and providing processor outputs representing relative movements of the mutually articulated body portions and a real time user feedback generator operative to generate predetermined feedback to the user in response to predetermined selected movements of the mutually articulated body portions.

Abstract: 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.