The swimming is a sport whit much beneficts for your healt, in the personal is a activity relaxed, creative, that help to the body for active the muscles, reduces stress, improving coordination, balance and posture, improving flexibility, etc. Is a exercise very complet, that is perfect for all people of all ages and is a activity of survival as the people go to a swimming in seas, pools, etc and is a risk if the person does not know how to swim and knowing how to swim can prevent an accident or even death.
For more information consult the link.
https://www.betterhealth.vic.gov.au/health/healthyliving/swimming-health-benefits
The magic of the science 