Maybe this has been discussed earlier. I guess this question/thoughts are for Rebecca, Yul and David. I've read and heard a lot about USRPT but it seems like few coaches dare to try it fully. (No one in Sweden at least) My daughter, BeeBee 13, almost quit swimming last year. It was a pain before every practice. Long story short, she changed swim club, new coaches that "see" her and now she is always ready before me to go to practice. They dont do USRPT but their practices reminds a little bit about it. The dropped 6 sec on 100 back, 5 sec on 100 free and so on since she switched club. So it seams like their training suits her beter. (Or perhaps she was overtrained before... 6 times a week + 2 gym sessions 2-3.5h every session) The USRPT has been said to keep swimmers in the "game" because it doesnt take 2-3 hours each practice. Young swimmer feels they have time for other things as well. The age 11-15 is a fragile time as they grow, enter puberty, friends are changing and so on. I know that Michael Andrews is a big fan of USRPT and talks about it a lot.