Get into a plank position with your arms straight and hands placed directly underneath your shoulders. Lower your torso until your elbows form a 90 degree angle while maintaining your plank position and a neutral neck. Straighten your elbows to return to full plank position. Shift your weight over to one side and rotate your body to raise your arm. Lower your arm and return to plank. Repeat on the other side before returning to neutral.
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