
A training device useful with a putter having a head and a shaft extending from the head has a sight line, which may be delineated by a taut string, and two rails for guiding the shaft as the putter is swung through a limited range defined by the rails. The limited range includes an intermediate position, in which the head of the putter is positioned in a lowermost position, a subrange of back-swing positions, in which the head of the putter is raised from the lowermost position, and a subrange ...











