Swimming helps your arthritic joints and provides strength that's good for your muscular endurance. Swimming increases your cardiovascular functional capacity as well,which means your heart is more capable of pumping blood efficiently.
Swimming was not widely practiced until the early 19th century, when the National Swimming Society of Great Britain began to hold competitions. Most early swimmers used the breaststroke. Swimming has featured on the program of all editions of the Games since 1896. The very first Olympic events were freestyle (crawl) or breaststroke. Backstroke was added in 1904.