Sit comfortably? Improve your balance, coordination and strength? It's all possible with this inflatable Tunturi fitness ball. The gym ball is suitable for various fitness exercises to strengthen and stretch your muscles. The fitness ball is ideal for the home, but is also widely used in yoga and gyms and rehabilitation centers. In addition, you can also sit on the sitting ball behind your desk or in front of the television. Because your body always has to find the right balance, you unconsciously strengthen your muscles and improve your posture. The gym ball is inflatable and you can pump it as firmly as you like.