By Cokie Lepinski - Here's a drill that has multiple benefits for backstrokers. It will help with timing of your arm strokes, getting you to rotate from your core, and keeping your kick steady. And the good news is that this is an easy drill to learn and master. You can do this with fins or without. If you already have a good kick, go without fins. If your kick needs work, don your fins, but you'll ultimately benefit much more without fins.