A stimulant target unit (100) including: a housing (105), at least one stimulation source (118) configured to provide a stimulus to stimulate a user, a contact sensor (370) configured to detect an impact to the stimulant target unit and triggered by an impact that is within a selected range of impact forces, a feedback system configured to inform the user the stimulant target unit has been actuated in response to the stimulus, a controller (352) programmed to register triggering of the contact sensor, a protective cover (625, 760, 810) configured to retain the stimulant target unit and a mounting structure (610, 755, 815, 915) configured to connect the stimulant target unit to a support structure. The mounting structure includes a vibration isolator (645) configured to, over the selected range of impact forces, inhibit transmission of force from an impact within the selected range of impact forces on the support structure to the contact sensor sufficiently to prevent the triggering of the contact sensor.
