An adjustable golf swing training apparatus is disclosed, the apparatus comprising a support structure for supporting the golf swing training apparatus in a support plane, and a telescopic swing training arm connected to the support structure and further connectable to a golf club shaft. The telescopic swing training arm is magnetically biased toward a predetermined length, whereby the swing training arm is urged toward the predetermined length in response to axial movement thereof in either first or second directions away from the predetermined length. The predetermined length is such as to accommodate a preferred path of travel for a golf club through a portion of a golf swing.