Fun .... and fuels the muscles!

Okay, a Schwarzenegger or Stallone is not so. ;-)
However you get with regular games * sorry, I mean training *, really strong forearms, a firm handshake and fall sooner or later in the "turning and Rotierabhängigkeit" .... because it's really fun and you can take the Powerball, who also really good in the hand, exercising at jeeeeedem place.

A Little Hint:
Try in the dark, then you will feel like John Tavolta under the disco ball!
Absolute buy recommendation!