Abstract: Method and apparatus for training or teaching students and practitioners of chiropractic to properly apply force by hand to adjust the joints of the human body, especially the vertebrae of the spine. The device comprises a base member having an arm member pivotally hinged thereto for movement toward and away from the base member. Compression springs positioned between the arm and base members provide a resistive force to movement of the arm toward the base and means are provided on the arm member to receive a fracturable or deformable object having a force to fracture at low velocity which is substantially less than the force required to compress the springs. The user of the device attempts to move the arm toward the base and into a locked position against the force of the springs by applying a high speed force by hand against the fracturable or deformable object.