Anchor the back of your ribcage into the floor.
Squeeze a yoga block between your forearms.
Rotate your shoulders so that your palms orient in the direction of your head.
Keep elbows in line with your wrists. DO NOT let your elbows move wider and outside of your wrists.
Pause in the extended position and breathe easily for several breaths.
Repeat for 5 rounds.
To make this movement more challenging, progress to the Lying Dumbbell Pullover.