Use this to improve my core strength. Ball is very durable and as described. Takes pressure off your back when you do certain positions. Read the instructions it comes with for what exercises to do by yourself. Really handy. 

Love it, use it for years. For my at home work puts it is the best thing! Very recommended for everyone. Valeo core training ball work great

I originally bought this for my daughters therapy to strengthen her core, but I love using it too it makes a real difference to my core!