Exercise Instructions
Step One
Lay on ball in a bridge position with both feet on the ground, and the ball positioned in the small of your back.
Step Two
Keep your knees bent to 90 degrees, and your hips extended.
Step Three
Cross your arms over your chest and lift your trunk and one shoulder upward until your abdominals contract.
Step Four
Keep your back on the ball while you twist. Hold and slowly return.
TIPS
Don't let the ball move under your back.
Variation
Change the position of your hands to behind the head to increase the challenge.