Very good seat and exercise ball

For about two weeks I am concerned with the issue of stability ball / exercise ball since I got due to sedentary work in the office back problems. Once I have a lot compared, and many reviews read through, I decided for the Powerball Premium ABS.
So much in advance: The ball is excellent.
Since I bought me the ball, especially to sit, I just want the people who are uncertain regarding,. The size and characteristics
briefly explain:
1. There is the pure exercise balls. These are often the material as well as the air pressure ago very soft to medium soft.
2. There is the combined aerobics / seat balls. These are often a little harder, and slower than the exercise balls. However, they can be for
use both applications.
3. The pure seat balls. Of this, however, one finds very little. They have more the characteristics as that of combined balls.

The Powerball Premium ABS is a combination ball. So for exercises and sitting suitable. However, if you mainly / solely want to use to sit the ball, you should consider the size that is needed. A very good guidance and explanation for this can be found here:

gymnastikball-sitzball.de/gymnastikball-sitzball-groesse/

For Sitzball the lower leg length, the less height is crucial as a right angle between the lower leg and thigh to be formed while sitting. The hip does not have the height of the knee be vll. Even a little darüber.Aber too high! Below would also be bad. I was also surprised when I the ball Sizecalculator proposed a 65cm ball to sit because I'm 1,90m tall (and about 98kg heavy). After I sat down, but with a physical therapist, I know well, to a likewise 65 cm ball (was also a Togu Powerball), and he said that the suits, I was convinced. For pure sports / exercise application I would have at least used a 75cm ball. All right, ordered ball.

After fast delivery within 2 days, unpacked the ball first unfolded). Odour default can I associate myself with the other reviewers here. Hardly smell only when you go close to the nose. Definitely not your typical plastic / rubber smell like wading or other inflatable toys. The material is quite thick, already reminds me of a more rigid dinghy. The surface is slightly roughened but somehow smooth .. As described "leathery". (Please read) all the instructions first inflated to approximately 70-80%. Tempering The material I had not so, as it currently (in the summer) has always at least 20 °. waited three hours and then blown up to 100% and then allowed to rest for almost 24 hours. This is probably very important for the special ABS material can stretch and adjust properly. Pumped back the next day and for the first time fully loaded. Especially in the first few days you have to re-pumping from time to time, until the rubber has reached its optimum elasticity. So do not wonder or think the ball has a hole. The incurred through packaging folds and creases are also largely disappeared.

To sit: It sits beautifully on the ball, especially because he is a little egg-shaped and dardurch not roll away as quickly. However, the circular shape he gets after a few minutes "relief" automatically resets. Some reviewers complain about this, that the ball just will not remain circular. But also for exercises that does not matter. Ok, to play the ball is perhaps less suitable and intended. If you want that, you should look rather for another product (without ABS). So far I am quite happy, would respect the Nachpumpens report in a month or two again.
Another positive aspect is the enclosed poster with 9 exercises. Two plugs and an air pump top, for which pump Anyway ??; are included.
Instructions in English, German, French, Spanish. Air pump must be purchased separately, I use my dinghy. Works fine.
From me a strong buy recommendation!