Miniature exercise machine with a high fun factor

Fun! Fun! Fun! Thus one can describe this small inconspicuous marvel. There is also a real training value for all the arm muscles. Depending on the attitude of the arm forearm, upper arm and shoulder are trained and completely with little effort with bulky sports equipment. Of course it is not a complete replacement for a weight bench or the like, but who wants to do on a small scale in between some of his muscles is right here. Unfortunately, there is contained in the instructions completely to address an accurate description of the necessary posture to the right muscles. Here one is forced to make the Internet the pages well described accessible. In addition, it also referred to yes with two twisters can train simultaneously. ??? I beg your pardon? Who is not a skill required to start the part the supplied string and thus both hands. And even if one has to start as described the device over the palm so foolishly only two hands and in keeping the already started part. So how in heaven's name should we start Twister Nr. 2 ??? On the solution of this riddle I'm still working.