I enjoy swimming, it's among the top public recreational activities and it keeps me in shape
I love to swim and its a low impact way to get some exercise. how long have you been swimming?
Since I was a young child. I swim for exercise, though many swim for recreation, sport, and even survival 
I love to watch competitive swimming, have you ever done that?
I don't watch many national or international competitions, but I usually watch swimming during the summer Olympics
I like that swimming is low impact on my joints I can swim for hours without being in pain
only slightly less dense than water, water supports the weight of the body during swimming. As a result, swimming is “low-impact” compared to land activities such as running. The density and viscosity of water also create resistance for objects moving through the water. Swimming strokes use this resistance to create propulsion, but this same resistance also generates drag on the body.
Hydrodynamics is important to stroke technique for swimming faster, and swimmers who want to swim faster or exhaust less try to reduce the drag of the
Many swimmers swim for recreation, with swimming consistently ranking as one of the physical activities people are most likely to take part in. Recreational swimming can also be used for exercise, relaxation or rehabilitation. The support of the water, and the reduction in impact, make swimming accessible for people who are unable to undertake activities such as running.
Purpose Health.
Swimming is primarily a cardiovascular/aerobic exercise due to the long exercise time, requiring a constant oxygen supply to the muscles, except for short sprints where the muscles