I love swimming when it is hot outside it is so nice.
I like to swim also, it is defined as the self prpulsion of a human through a body of water for various reasons.
I have heard that the sport of swimming is quite hard
It can be difficult to learn as it involves coordinated movement of both your limbs and body as a whole.
Yeah I have heard it takes a ton of coordination 
Humans are able to start holding their breath as early as a few weeks old, isnt that interesting?
Yeah I remember my sister would hold her breath until she got what she wanted as a kid
Anyways, back to swimming...It can be considered a formal sport . Swimming is known locally, nationally and internationally where they do competitions.
Isnt Michael Phelps one of the best swimmers in the world?
Michael phelps is now retired but he was the most successful olympian of all time. he won a total of 28 models.