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Primary Muscle Group: Abdominal - Internal and External Obliques
Muscle Groups Worked in This Exercise: Side Abdominal - Internal and External Obliques, Deep Abdominal Muscles (transverse abdominis), and lower back (erector spinae)
Preparation: Lie on your side over the stability ball so your left hip is resting on the ball. Spread your legs for good solid balance.
Execution: Hold a medicine ball over your head and curl up towards the ceiling. Lay back down across the ball and repeat the movement. Repeat with the other side.
Here are a few suggested alternative exercises:
Ab CrunchAb Crunch - MachineAb Crunch ObliquesBall Crunch TraditionalDouble CrunchDumbbell Side BendsKneeling Cable CrunchKneeling Oblique TwistLateral Bend with Barbell
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