Abstract

A teaching device for indicating in real time the movement of a selected part of a person's body beyond a desired boundary limit is provided, as well as a method for teaching a person to control his or her body movement in response to alarms provided by the teaching device. The teaching device includes an element for detecting movement of the selected body part beyond a boundary limit, a first alarm element for providing a first alarm indicating encroachment of a nominal misalignment zone in which the body part is nominally out of alignment with a preferred location thereof, and a second alarm element for providing a second alarm in response to encroachment by the selected body part of a significant misalignment zone in which the selected body part is significantly out of alignment with the preferred location thereof. The first alarm provided by a first alarm element is an intermittent beeping tone and a blinking light. The second alarm provided by the second alarm element is a continuous audible tone and continuous illumination of a warning light. A person wears the teaching device on, for example, an arm or a leg and adjusts the alarm limits. Thereafter, as the person executes a series of body movements, the first or second alarm will be provided if the arm or leg to which the teaching device is attached moves beyond the acceptable boundary limits of the proper position of the arm or leg during the series of body movements.