A training aid for an athletic movement comprises: an EMG acquisition device for placement on a muscle of a user. The training aid is configured to: identify an acquired set of EMG signals generated during the movement from muscles in two different appendages; divide the set of EMG signals into a sequence of smaller time intervals; compare the placement in the smaller time intervals of peak EMG signals in the acquired set of EMG signals to a reference criteria; identify whether the acquired EMG signals satisfy or does not satisfy the reference criteria during the movement. A set of movements are displayed, such that a displayed movement is matched to acquired EMG signals during one of the smaller time intervals, and the movements are displayed with an indication of which move or moves are wrong based on whether the EMG signals matched with the movement, satisfies the reference criteria.