I love summer.  This time of year is a perfect time to go swimming.
Swimming? The self-propulsion of a person through fresh or salt water, usually for recreation, sport, exercise, or survival? I love it! 
Swimming is one of the best workouts you can do.  It works all of your body, gets the heart rate up, and it is very low impact!
And swimming is low-impact compared to land activities such as running.
Yes.  Swimming actually works more muscles than running or biking.  And it offers much more resistance as well
Interesting! And since the human body is only slightly less dense than water, water supports the weight of the body during swimming which is why swimming is low impact.
Another benefit is it actually helps build bone mass.  And it increases flexibility.  It is one of the best all around workouts
Yup. I guess that's why swimming is consistently among top public recreational activities.