Correction of some reviews I've read.

I have aushohlen a little. A few weeks ago I got this so-called AOK ball given. This I have used (153Kg) as sitting ball. A super Sitzball because after a few days my back and shoulder pain was simply gone. The ball forces push through a repeatedly to the back and to sit straight. And he takes in spite of my weight in no egg shape.
Unfortunately, I am so over any pointed object rolled us it's broken.
I want to make me then Sly and these balls looked at their descriptions and their ratings.
It says for example. The AOK-ball is not a ball seat, but an exercise ball and these are available in various diameters and load strengths. There are also different diameters at Sitzball but only one load strength. For all other balls "suitable for sitting only conditionally or not" also is it (dynamically)
I then served me a proper fit ball. Sit after 5min it is still about 35cm high to make it a Katzenbuckel the ball (the egg) is too static he rolls no longer you have to push and even with acquaintance with a significantly lower body weight the same image it just takes a little longer it back and forth ,
Conclusion I will not buy this ball. That does not mean that I think nothing of a sitting ball just based on my experiences with these two balls I say, next time has a Powerball the same characteristics as the AOK-ball but is heavier loads.
I hope I have all Interesierten delivered a decision possibility. The right ball is doing really well.