Mention of a check is made for swimming. The objective is that the strength of the heart, lungs, strong, healthy body healthy and strong different muscles. Swimming can provide everything that we expected.
The mention of a pool. The objective is the strength of strong, healthy lungs and healthy heart, strong muscles to swim so they can get everything as expected.
Talking about the swimming exercise The objective is the strength of the body strong, strong heart, lung and muscle parts, strong swimming, so can give everything as we expected.