Designed for improving your balance flexibility and core strength as well as for strengthening abdominal and lower back muscles this lightweight adidas gym ball features an anti burst material for added safety and a dual texture grip to provide extra stability the gym ball has a diameter of 75cm 295 and is suitable for users who are 188cm 6 2 or taller the swiss ball can be used for low impact aerobic exercises stretching resistance work and strength training exercise routines