The small Mini Stability Ball will have a big impact on your workout and posture! Use this wonder prop to up muscle activation in sitting, standing or lying exercises that target arms, tummy, buns and thighs. By bringing instability to your movements, you’ll switch on your deep stabilizing muscles, firing up the core while demonstrating the gaps in your form. You can also use your ball to roll out sore muscles or to support low back or neck during exercise.