Principles of the Ninja Paddler: Efficiency & Style for Kayakers You know all the kayak strokes but your paddling could be more polished and easy. Principles of the Ninja Paddler will help you make your boat dance by shining light on the concepts of efficiency and style for kayakers. Each principle is explained clearly and simply, and is tied to a practical application. Recommendations for practices are also provided. Transform your paddling by applying the concepts of the Ninja Paddler.