Suitable for all ages, this exercise ball and pump is recommended for 5'5 and below. The gym ball can be used by professionals and home use due to its high quality technology. Gym balls can help strengthen, rehabilitate and tone muscles throughout the whole body including your bodies core muscles which are so important for good posture. Due to the thickness of the anti burst technology, the ball will require inflation in a warm room to enable the ball to stretch to its full capacity.