Swimmers on TV were subjected to natural selection in the sport, indicating that taller swimmers are more likely to be quicker. We typically allude to a person's height when we say they have a "swimmer's body." The reason is that people who are taller require more powerful muscles to move through the water efficiently. There are other factors that come into play too, such as leg strength and how much muscle mass you have, but overall size matters. In conclusion, people who are taller need stronger muscles to swim properly. This allows them to be faster while still having enough energy left at the end of the race to come out on top.