The balance ball from 4FIZJO has a diameter of 60 cm and is ideal for both static and dynamic training. Using it, you can perform a wide range of exercises for the entire body, whether on a concave or flat surface. The concave surface is suitable for balance exercises that activate and strengthen muscles, while the flat surface allows you to do exercises like sit-ups and push-ups. Regardless of the position you choose, this ball offers flexibility and adaptability during your workout.