Thescience of swimming has evolved considerably. It's no longer just about floating, but also about minimizing water resistance and using the principles of fluid physics to transform every arm movement into powerful propulsion. In this guide, we have combined-The psychological aspect: overcoming fear and building mutual trust with the water.-The technical aspect: a detailed explanation of the four strokes (crawl, backstroke, breaststroke and butterfly) that breaks down the movement into its simplest components.-The training aspect: developing practical training plans based on the principles of modern sports physiology.For all readers For beginners: We promise that fear will turn into pleasure, and that the heaviness you feel will become lightness and fluidity.-For professionals: Here you'll find the precise details that make the difference between a "good swimmer" and a "champion", from water entry angles to fearsome starting techniques.Swimming is the only sport that gives you a feeling of weightlessness, a sanctuary where the noise of the outside world fades away.