Yoga ball is ideal for working out at home or in the Yoga center. improving your balance and co-ordination with yoga exercises.

The stability ball is a great way to get extra support for moves that require endurance and flexibility, and it also adds a balance challenge to some poses. The lack of stability only adds to the workout, firing up different muscles and strengthening the connective tissue that supports the joints of the body.
The size of the ball makes a difference and you may want to use a smaller ball for some movements
Just like a foam roller, yoga balls too can be used effectively to stretch muscles. This improves muscle flexibility and even blood circulation in and around the muscle group. This improved flexibility and enhanced circulation, prevents injury during yoga.