Sit on the ball with your feet hip width apart, spine lifted as if you are trying to touch your head to the ceiling, and your abs pulled towards your lower back.
Breathe deeply and place even pressure on your big toe, little toe, and heel. Widen your feet if you need more assistance with balance, or bring your feet together for more challenge with balance.
Your stability ball may look and feel different than others but as long as it is firm enough for you to sit on with approximately a 90 degree bend in your legs, it is a good size for you.
Erector spinae, Rectus abdominis
TIP: Engage your glutes and lift through your pelvis to feel your entire torso involved in the active sitting exercise.
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