Coordination training: the body is imbalanced by the instability of the air cushion and must restore it by constant small balancing movements. This ensures an enormous training effect and makes coordination training equally challenging and efficient full body workout. Relieving sitting: the ball cushion with nubs is suitable for dynamic sitting and moving back training such as building the core muscles, training the spine muscles and a gentle swinging of the intervertebral discs. Promote blood flow: the nubbed surface stimulates your blood circulation during training and ensures a tingling skin feeling. The non-slip underside of the cushion ensures maximum training safety. Matching hand pump: the balance cushion comes with a small hand pump. This allows you to fill the training cushion individually with air and vary the training intensity as needed and as desired. Compact design: diameter of approx. 33cm The perfect device for all those who like in everyday life, e.g. at work or on the go when driving by car or by train.