Now that summer is here, I get to do my favorite sport, swimming.
I hear that!  I took up recreational swimming at the public pool at the YMCA,and I love it.
Its among the top recreational activities and great exercise too.
Do you have a favorite stroke you like to practice?  Butterfly, backstroke, for instance?
I guess the breaststroke and the butterfly. I love watching  Olympic swimmers too.
Yeah!  You can certainly win a lot of Olympic medals at swimming, much like Michael Phelps.
He is amazing to watch. Its a cardiovascular aerobic exercise, except for short sprints. 
One of the lovely contradictions of swimming is that the more fat you, the better you float, but if you swim a lot, you won't float as much because you've lost the fat.
I didn't know it burned that many calories. I am going to step it up a bit then, I need to lose a few pounds.
You can certainly swim as much as you like without fear of body trauma.  It's a low-impact exercise compared to running.
That makes it good for older people too.