Abstract: A golfer's exerciser of the isometric type includes a golf club-simulative member having a shaft grippable at its upper end in the manner of a golf club. The grip-remote end of said club-simulative member is pivotally affixed at a position in front of the user for presenting the shaft in an orientation simulative of the position of a golf club at the moment of impact of the golf club with a ball. A dynamic indicator provides resilient interconnection of said grip-remote end with an affixing structure dynamically, resiliently resisting movement of the grip-remote end laterally away from an initial position defined by the affixing structure, permitting such movement from the initial position only upon user development of a predetermined minimum dynamic force of ball-striking character, with such movement providing the user with dynamic indication of a ball-striking force exerted by the user of magnitude sufficient for development of the user's musculature.