I have the ball as a supplement to my Blackroll bought because I was recommended by my physiotherapist him. I was skeptical at first if the ball is truly necessary, but since the first unpacking and try I'm really excited. You can reach with this little ball (the 8 cm are fully sufficient) the fascia much better. The massaging action is more intense and you edit the muscles targeted, even on foot. At the same time you can also use the ball on a wall (with its back against leaning), edit the shoulders, neck and back muscles. I must say that this is a very pleasant "experience".
I rarely write reviews on Amazon, but here I just have to say a big praise, because this "product" has exceeded my expectations by far! Of course it's just a ball, and sogesehen not a new invention, perhaps considering the cost of materials and a bit overpriced. But wg. the applications / therapeutic effect, it has been more than worth it!
