Eb says: It's not hard to do a bird dog: Get on all fours, raise opposite arm and leg, lower, blah blah. But the bird dog is at its best when you're intentional and very focused on every movement.

So why not add some bite to your moves by learning to do the bird dog – named for the well-balanced way a hunting dog like a Pointer stands when it shows the way to the prey. Building a strong ...