The zen of swimming

Swimming is the best kept secret of the exercise world. If everyone swam, the world would be a healthier, happier place. It is relatively injury free, develops great lung capacity, tones up the whole bod, gives you a certain weightless high, keeps the fat down, gets those endorphins buzzing. I imagine that it almost feels like flying. I was looking through a runners catalog and was amazed at all the stuff they sold for injuries to feet, knees, hamstrings, shins, ankles, etc. You don't see any of that in swimming catalogs. And one can study each stroke for years making little changes and never quite perfecting it.