I love swimming. Swimming is one of the top recreational activities and in some countries it is part of the regular curriculum.
Swimming sounds like a fun healthy activity.
Yes, it is a great low-impact exercise. 
Sounds like it.  Tell me more.
It is a rebound exercise. There are a ton of benefits. Of course there was a large uptick in people wanting to exercise in mid 1980s
So swimming can help me get in shape?
Yes. Any type of physical exercise will help you maintain fitness and overall health and wellness.
Okay.  Swimming seems to be easier of my joints.
Neurobiological effects of physical exercise
The are numerous and involve a wide range of interrelated effects on brain structure, brain function, and cognition. A large body of research in humans has demonstrated that consistent aerobic exercise (e.g., 30 minutes every day) induces persistent improvements in certain cognitive functions, healthy alterations in gene expression in the brain, and beneficial forms of neuroplasticity and behavioral plasticity; some of these long-term effects include: increased neuron growth, increased neurological activity (e.g., and BDNF signaling), improved
Swimming
Swimming is the self-propulsion of a person through water, usually for recreation, sport, exercise, or survival. Locomotion is achieved through coordinated movement of the limbs, the body, or both. Humans can hold their breath underwater and undertake rudimentary locomotive swimming within weeks of birth, as a survival response.
Swimming is consistently among the top public recreational activities, and in some countries, swimming lessons are a compulsory part of the educational curriculum. As a formalized sport, swimming features in a range of