Oh yes, it does take a lot of practice in swimming. I certainly did learned a lot from my dad who used to be a good swimmer when he was younger and in swim school during the summer.

Except for the speed, I got that boost unexpected a few months ago. Before I could swim in a relatively normal speed for a high level student athlete, nowadays I swim twice as fast as my teammates. I was so terrified by the change in speed that I was afraid to get back into the water for a good while but weirdly enough nobody in the swim team thought of it as strange.