Reply To: How to choose the number of reps on 20mtr pool Home › Forums › General USRPT Topics › How to choose the number of reps on 20mtr pool › Reply To: How to choose the number of reps on 20mtr pool February 8, 2015 at 7:08 am #2251 AnonymousInactive I have trained several swimmers using USRPT around that age using a 20yard pool. I found that 16 to 25 works well.