Ideal for dynamic, active, moved and healthy sitting at office or at home. Back pain prevention easily while sitting. Through constant motion your deep muscles of the spine and back are trained while sitting on the happyback Ballkissen. This can lead to muscle growth in these regions, so it can relieve your back pains. The TOGU happy Ballkissen is ideal for exercises to strengthen the abdominal muscles, back muscles and spine. Stability exercises and balance exercises are also possible. The knobbed site can also improve the blood circulation. Fitness and strength exercises with the TOGU Ballkissen at: http://www.youtube.com/watch?v=5f1wy4oHTiA or: http://www.youtube.com/watch?v=UqfbfhhV830 More at: http://www.togu.de/en/Health-Fitness/Ball-cushion/happyback-Ballkissen-33-cm-anthrazite.html