I like to swim. Do you like swimming?
Sometimes. I'm maybe a little too self-conscious about how I look in a swimsuit to do it as much as I'd like.
Ah, I see. But, swimming is the self propulsion through water for recreation, sport, or exercise. It can really tone you in places
Yes, I imagine it really would tone me if I did it for exercise. Maybe I should swim more so I look better while swimming...
Yea! Locomotion is achieved through limb movement coordination so, as you can imagine, swimming works a lot of muscles. It's a great workout
I've read that it's also a great form of physical therapy for people with severe injuries. 
It can be as swimming relies upon the natural buoyancy of the body. You feel lighter in the water