It is often used instead of a chair at a desk or while watching TV, as the relative instability of the balance ball will force your abdominal muscles to work harder.
Double Peanut Ball: Improve flexibility and blance of body, relieve muscle tension, promote circulation of blood.
Spiky Ball: Specially designed for point massage, great tools for reflexology and mobility.
Fascial Ball: Massages partially and massage soft tissue deeply, also great for fascial relaxation.
A great combination to meet your different needs, all could be used before or after exercise.