Arena apparatus and methods of using and constructing same

An arena apparatus for staging a sport with at least one athlete, the arena apparatus comprising:

• a floor having a perimeter;
• and
• at least one wall coupled to the floor at the perimeter and extending upwardly and outwardly from the floor at an obtuse operative angle relative to the floor, the at least one wall comprising at least one rigid or padded panel, an adjustment structure configured to adjust the obtuse operative angle of the wall;
• wherein the wall includes a plurality of connection points and the adjustment structure includes a brace configured to be selectively coupled to one of the connection points and a primary support rod having a proximal end coupled to the wall and a distal end coupled to the brace;
• wherein the obtuse operative angle of the wall prevents the athlete from standing on the wall.