Balance: The first principal of efficient swimming. The bicep pillow drill. Newer swimmers raise their head to breathe. This causes your legs to sink and creates drag. Think of a seesaw. When one side goes up, the other side drops. We want to find that perfect balanced position so we stay even in the water. We need to teach ourselves how to rotate to the side enough to make room for a breath. The bicep pillow drill is a a great way to practice the perfect low head position for breath.