Beginner Triathlete - Abdominals articles
Standing Twist with Dumbbell
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Russian Twist
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Reverse Crunch
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Knee-In Crunch with Medicine Ball and Rotation
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Knee-In Crunch with Medicine Ball
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Modified Jackknife Sit-Up
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Stability Ball Streamline Knee Crunch
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Stability Ball Knee-Lift Crunch
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Wide Knee Crunch
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Core Exercises #1