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Change How You Hold Your Dumbbell To Really Hit Abs, Chest
This circuit trains you to hold tension in your trunk while moving your extremities -- the foundation for most athletic movement. See how it's done
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This Mini-Workout Blasts Your Abs, Shoulders And Arms All At Once
This finisher ensures you get some focused core stability work, which will improve posture, minimize the risk of back injury, and improve athletic performance. From trainer Andy Speer
