Abstract: The apparatus is attached to a body part (for example, the back) of the user. The apparatus detects when the body part attitude exceeds a specific attitude range. For every such attitude violation, the apparatus sounds a buzzer and increments a displayed counter value that indicates the total number of such attitude violations. The apparatus may be used as part of physical therapy to modify the behavior of the user during routine physical activities. The sensitivity of the apparatus may be adjusted by controlling the specific attitude range.