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?
Exercise
Exercise is any bodily activity that enhances or maintains physical fitness and overall health and wellness. It is performed for various reasons, to aid growth and improve strength, preventing aging, developing muscles and the cardiovascular system, honing athletic skills, weight loss or maintenance, improving health and also for enjoyment. Many individuals choose to exercise outdoors where they can congregate in groups, socialize, and enhance well-being.
Classification.
Physical exercises are generally grouped into three types, depending on the overall effect they have
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