Swimming

I started swimming 4 months ago.  I remember going to the pool for the first time and swimming 1-1/2 laps...that's it.  I was exhausted. My goal was to swim at least 30 minutes by the end of my little punch card for the Aquatic Center.  At the end of my punch card, I finally made it 30 minutes in the pool.  I was up to a one mile swim.  This is probably my weakest area in the 3 sports.  I try to swim at least 3 times a week.