The game is actually to see how flexible they are and these girls are part of a national idol group so the show pushed them to see if they could smile even if in pain. We would love to go to Japan and see all the other stuff they got going on.
It’s a “battle” between the Regular team and the “newbies” and they are supposed to keep their smile. These group is part of the largest idol group in the world and they’re having a general election next month. Much bigger than politics. Making fun of them is offensive! You’ll eat your words one day.
Video 1, Another WTF Japanese game show – Spread Your Legs