Abstract: A training method and apparatus for improving a physical technique, action, move or routine includes a portable electronic device which may be unobtrusively worn by the user. The portable electronic device includes motion sensor such as an accelerometer and/or gyroscope to determine the orientation and movement of the device. By monitoring the output of the motion sensor and applying the values according to predetermined movements, the user may be immediately provided positive and negative feedback. The device may be worn by the user during exercise or a sporting event without interfering with the user's movement.