Axis click (aka Right Stick or LS) is a button , not axis input. Either look for it as a key code (joystick0 button8) or create a virtual button thru the Unity input editor.
Thank you for your reply, however I am not looking to use the axis click function.
Maybe I was not clear enough in my original post. What I'm looking to do is press left or right twice on the joystick in quick succession to start sprinting.
However when I try to get an axis event from that it fires every frame if the axis is held, thus I don't know how to make what I'm trying to do happen.
The axis input works in an entirely different fashion from the buttons. I understand how to use the buttons for functions like this, but the axis is beyond me at the moment.