Swimming is one of those activities that often gets overlooked for its fitness benefits. That’s often because it’s a lot of fun, so often doesn’t feel like an intense activity that will help build muscle or improve your cardiovascular fitness. This is a misconception though, as swimming is one of the best exercises for a full-body, low-impact workout. The reason being that it offers the ability to work all your major muscle groups without any harsh impact to your skeletal system.