Sure you can... Once I asked my friend that apparently does swim how long her 50 free took. She said about two minutes. I was like, oh my gosh that's terrible! Then I elaborated that a 50 was a lap, and she said, oh I thought that you were talking about 50 LAPS! Then I was thinking to myself there is no way that anyone can swim 50 LAPS in TWO minutes! Omg it was so funny!