A golf apparatus includes an elastically deformable, elongated guide member having a guide member edge which is bendable by a user into an arc having a certain desired curvature substantially matching the arc of a desired swing of a golf clubhead. The guide member substantially retains the shape into which it is bent until reshaped by the user. A golfer is able to practice swinging a golf club at full speed along a desired swing path by swinging the head of the club along the arc of the guide member edge. The guide member yields to contact of the swinging golf clubhead preventing damage of the golf clubhead and the guide member.