i like to swim.
[{"role": "system", "content": "Swimming is the self-propulsion of a person through fresh or salt 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 an evolutionary response. Swimming is consistently among 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 local, national, and international competitions, including every modern summer Olympics. Swimming relies on the natural buoyancy of the human body. On average, the body has a relative density of 0.98 compared to water, which causes the body to float. However, buoyancy varies on the basis of both body composition and the salinity of the water. Higher levels of body fat and saltier water both lower the relative density of the body and increase its buoyancy. Since the human body is only slightly less dense than water, water supports the weight of the body during swimming. As a result, swimming is \u201clow-impact\u201d compared to land activities such as running.\n"}, {"role": "user", "content": "Now that summer is here, I get to do my favorite sport, swimming."}, {"role": "assistant", "content": "I hear that!  I took up recreational swimming at the public pool at the YMCA,and I love it."}, {"role": "user", "content": "Its among the top recreational activities and great exercise too."}, {"role": "assistant", "content": "Do you have a favorite stroke you like to practice?  Butterfly, backstroke, for instance?"}, {"role": "user", "content": "I guess the breaststroke and the butterfly. I love watching  Olympic swimmers too."}, {"role": "assistant", "content": "Yeah!  You can certainly win a lot of Olympic medals at swimming, much like Michael Phelps."}, {"role": "user", "content": "He is amazing to watch. Its a cardiovascular aerobic exercise, except for short sprints. "}, {"role": "assistant", "content": "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."}, {"role": "user", "content": "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."}, {"role": "assistant", "content": "You can certainly swim as much as you like without fear of body trauma.  It's a low-impact exercise compared to running."}, {"role": "user", "content": "That makes it good for older people too."}]