Swimming is an Olympic racing sport where athletes use their entire body to move through water, competing in strokes like freestyle, backstroke, breaststroke, butterfly, and individual medley. The sport has ancient roots, with evidence dating back to Stone Age paintings around 10,000 years ago, and the first known book on swimming was written in 1538 by Nikolaus Wynmann. Competitive swimming emerged in England in the 1830s, leading to the first indoor pool in 1828 and the formation of the Amateur Swimming Association in 1880. Captain Matthew Webb made history in 1875 by becoming the first person to swim the English Channel, taking 21 hours and 45 minutes. Men's swimming joined the Olympics in 1896, women's in 1912, and the global governing body FINA (now World Aquatics) was formed in 1908; the butterfly stroke was recognized as a separate style in 1952. While swimming offers many health benefits, competitive swimmers face risks like shoulder and knee tendinopathy, and strict regulations govern stroke technique and equipment.