Increasing numbers of elite backstrokers are using nose plugs in Backstroke. As I have advised to some lately, that benefits such as increased quality and distance achieved off the wall for "good Kickers", may be worth a look. I tried it last week and found that one expels less unused air keeping water from coming on board up your nose, thus making that air more usable and available to the working muscles. As long as expelling used air (exhaust) through ones mouth is regulated well, maybe worth an experiment. Thoughts???