This can help improve your strength, endurance, and flexibility, as well as increase your cardiovascular fitness. Swimming is also a low-impact form of exercise, which means it is easy on the joints and less likely to cause injuries compared to high-impact activities like running or weightlifting. In addition to improving physical fitness, swimming can also have a positive impact on mental health. When you swim, your body releases endorphins, which are known as “feel-good” hormones that can help boost your mood and reduce feelings of stress and anxiety.