Swimming behind another person and ensuring your head pushes forward, without hitting their legs, is an effective way to check if your stroke mechanics are correct—particularly for hand entry and alignment. Here’s why it works and how to do it effectively: Alignment Feedback: If your hand crosses the centerline upon entry, your head will naturally tilt or your body will fishtail, making it hard to maintain a straight push forward. Shoulder Width Awareness: By aiming to keep your hand entry at sh