Information processing system, information processing apparatus, storage medium having information processing program stored therein, and information processing method

An example of a training tool includes a first sensor. The training tool deforms from a stationary state when a force is externally applied thereto. The first sensor output according to deformation of the training tool. A processor receives first sensor information based on an output of the first sensor. While a menu is presented, the processor executes a process according to a first instruction performed on the menu, in a case where the received first sensor information indicates an output obtained when the training tool deforms in a first direction, and executes a process according to a second instruction that is performed on the menu and is different from the first instruction, in a case where the received first sensor information indicates an output obtained when the training tool deforms in a second direction opposite to the first direction.