1. Lie supine on the ground or bench with back flat, knees bent and feet flat on the ground, grip the dumbbells with an overhand grip
2. Bring your elbows out wide creating a T shape - maintaining a bend in your elbows, forearms perpendicular to the ground - this is your start position
3. Drive your left arm across your body towards the right side reaching a full extension in the arm - this is your end position
4. Return to start position, alternate sides, repeat for desired number of reps

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