Looking for an office chair that could improve my back problems, I came across the Topstar Sitness Half ball. The product description is aimed in this direction and I decided to buy it. The price I find very fair for a chair. The order went smoothly. The chair was delivered solid packaged, the assembly a breeze. The design is very appealing. The height-adjustable stool, I can at my height (1.75 m) to adjust perfectly. In its 5 reels he is very stable, the rollers run very well on my carpet. After my first test seat I have drained some air. I like the seat a little softer. For a week now I use the stool in my study in addition to my previous work chair with armrests and high backrest. I use it mainly on my computer desk and am thrilled. In particular, 2 aspects appear important to me if I want to describe the improvement in my sitting posture: 1. The Sitness Half Ball reminds me constantly to a straight posture. In addition, the yielding seat allows the so-called dynamic sitting. The constant pelvic movements stimulate the muscles especially in the lumbar region. Sitting thus means a permanent training of the back muscles. 2. Secondly, I've discovered that the pelvic floor muscles is trained by sitting on the cushion of air. You have to move more deliberately in the pelvic region thereby. Then one can achieve a similar effect as in the training using the so-called Pezziballes. The use of components removed from the seat half ball I have not tried it yet. Maybe later. I initially rich the effects described above.
