My hobby

I introduce my hobby. My hobby is swimming. I have some reasons why I like swimmig. First, I feel swimming is fun. Second, I feel very comfortable. Third, in the pool, we can not move more faster than on grand, but we can do many kinds of action such as forward rotation, back rotation and so on.
It is unclear when I became I could swim, but pobably I think I was infant school. Nvertheless, first,I can swim the backstroke, among I can do the way of swimming, I am not good at swimming backstroke. So, I practice swimming backestroke hard, I want to be good at swimming backstroke.