A posture assessment and feedback instrument (FIG. 1A and FIG. 1B) all contained within a single housing (1). The output of a capacitive sensor (4) within the housing (1) varies in response to the distance between the sensor and the body of a user. The housing (1) is strapped to the body of a user (FIG. 3, FIG. 4, FIG. 5A, and FIG. 5B) with a belt (2). The application area is chosen such that the distance between the sensor (4) and the body varies in response to a defined posture change (FIG. 5A and FIG. 5B). Thus the sensor output will vary in response to the defined posture change. The output is compared to a stored threshold value and triggers a feedback signal when the threshold is exceeded.
