Apparatus for use by a golfer with a putter, and the method of its use, includes a member, removably and firmly attachable at/near its lower end to the shaft of the putter, and extending upwardly from the point of attachment and having an upper end, and the upper end of the member being adapted to contact an appropriate part of the anatomy of the golfer. When a golfer executes a correct putting stroke, the upper end of the member remains in contact with that part of the golfer's anatomy throughout the whole of the swing but, if the stroke is not correct, the upper end of the member either loses contact, or moves across, or presses harder into the anatomy of the golfer. A contact device in the form of a resilient ball or the like is fixed to the or each upper end. These are capable of giving an audible or visual warning of loss of contact with the golfer's body or of increased contact pressure with the body.