Designed for a wealth of core exercises to improve balance, strength and flexibility, the Champion Sports FitPro Training & Exercise Ball-Blue will make a great addition to any workout regimen. Made from high-quality Italian resin, this exercise ball is durable enough to withstand daily use, and the exterior feels soft against your skin. At 53 cm in diameter, this exercise ball is designed for people ranging from 5 feet 1 inch to 5 feet 6 inch in height. You can use it to perform a wide range of balance, core, strength, flexibility and rehabilitation exercises. It improves, maintains and strengthens hard-to-reach core muscles. The ball is burst resistant for increased durability during exercise routine.