Yoga and Exercise Ball - For Home Gym and Yoga Studio | BlueSTRENGTH. BALANCE. STABILITY. Once you decide that yoga is your preferred way of working out, an Exercise & Yoga ball then becomes a crucial element of your daily routine. At YOGACTIW, we have your needs at the core of our heart. This anti burst and extra durable yoga ball will make all your workout routines hassle free and yield you better results. The exercise ball is manufactured from durable and eco friendly PVC material that makes it lightweight.