The arc is a bunch of shit.
The board is a bunch of shit.
its a different sport, and this one is actual a sport unlike BB
i do not lift like this (well a little arch only because everyone else is doing it!) but this is the norm in "modern" power lifting, just like oiled men and thongs for BB.
the board is something that is used to help with the bench, westside uses them, and so does the elite fitness guys, even our own wolfe uses them.