A modular bat selecting simulator system according to various embodiments can include a handle weighted modular baseball bat configured to receive interchangeable weights in a handle portion of the handle weighted modular baseball bat. At least one tracking system configured to track movement of the handle weighted modular baseball bat and movement of a user while swinging the baseball bat. A computer configured for receiving data from the tracking system to determine an optimum bat weight based upon swing dynamics monitored while the user swings the baseball bat and outputting the data to a display. The display displays a virtual background including a virtual image of the baseball bat and a pitched ball, virtual movement of the baseball bat and the user swinging to hit the virtual image of the pitched ball.