Is swimming a good cardio sport?

Yes: An excellent one too as there is no pressure on joints...

Yes: Excellent low impact cardio exercise. You can vary tempo to increase heart rate as needed. Enjoy.

Recommended: Swimming provides unparalleled cardiovascular conditioning and is a great low-impact exercise with a boatload of benefits.

Swimming.: While running burns a lot of calories, all things being equal, swimming is considered the most effective form of cardiovascular exercise as it employs the whole body in constant muscular effort.