Golf swing playing aid device

A golf swing playing aid device adapted for use on a golf club having a handle, an impact head and a shaft, the golf swing playing aid device comprising:

• a grip member having an outer portion and an inner portion, the outer portion adapted for being grasped in a lower hand of a user, and the inner portion forming an internal passage extending along a longitudinal axis between a lower portion and an upper portion of the grip member for enabling insertion of the golf club through the internal passage, wherein the inner portion of the grip member includes one or more internal surfaces that are configured to engage against the golf club and promote a sliding movement against at least the shaft of the golf club when mounted on the golf club and when used in a sliding mode, such that when the grip member is used in its sliding mode, the grip member is gripped with the lower hand of the user and the handle of the golf club is grasped with an upper hand of the user, and during a backswing the lower hand and the upper hand of the user separate progressively as the one or more inner surfaces of the grip member are configured to slide against at least the shaft as the grip member slides toward the head of the golf club, and during a downswing the upper hand and lower hand progressively return back into proximity as the one or more inner surfaces of the grip member are configured to slide against at least the shaft as the grip member slides toward the handle of the golf club;
• the grip member including an electronic device, the electronic device comprising:
• a rotational sensor adapted to detect a change in rotation of the grip member relative to at least one axis of the grip member;
• a controller operably coupled to the rotational sensor;
• and
• an indicator operably coupled to the controller;
• wherein when the grip member is used at least in its sliding mode, the controller is configured to:
• establish an initialized orientation of the at least one axis of the grip member with the rotational sensor;
• determine the change in rotation of the at least one axis of the grip member relative to the initialized orientation of the at least one axis as detected by the rotational sensor during the backswing and/or the downswing as the grip member is gripped by the lower hand and as the grip member slides along the shaft so that rotation of the lower hand during the backswing and/or the downswing can be detected;
• and
• when the change in rotation of the grip member in the lower hand is greater than a threshold amount, indicate with the indicator that the threshold amount has been exceeded.