Meanwhile, I've also bought a for training at home. The ball is delivered in a box along with a exercise poster and a tube for inflating. But instead of the tube it also does a cut drinking straw. The balls must not be blowing baffle, for some exercises, it is advantageous if the ball is more likely to "plum", for example, if you put forward or kneeling. It is closed with a small plastic plug which does not fly off the ball even with heavy pressure. The air which is in it, there is also. If you want to take him, he made really small with no air and is an ideal companion while traveling.
The ball is very simple exercises to be carried out, for example, you can clamp it between your legs and push, like is of course also with the poor. But there are also more complicated, almost acrobatic variants supported with one knee on the ball, stretch the other leg back and so keep the balance. It is possible to all areas of the abdomen, legs, Po, back to train neck and neck muscles, but also for the body awareness and relaxation exercises, he does a good job.
For so little money a brilliant exercise equipment, exercises and instructions for the way one finds on the Internet.