Are you a swimmer? Do you propel yourself through the water?
I love to swim I'm no professionel
I agree. It's a coordinated attempt to propel yourself through the water with your muscles and limbs - what a great sport.
I can propel myself for long minutes.
That's great. This locomotion can send you through great spots.
It can also save you from drowning!
This is true - and it relies on natural buoyancy of the human body.
Yes indeed you have to have good balance.