At my local pool in the UK they are picked from the swimming team. When I was in the team (many moons ago) we were doing 60 laps for a warm up. That&#x27;s about a mile. So they are good, strong swimmers.<p>Interestingly CPR success rate is really low (around 20% I seem to remember.) We&#x27;re all told that. After a couple of breaths into the patient, if they don&#x27;t start coughing up water and sit up, then you&#x27;re not likely to save them. So the qualifications don&#x27;t matter so much as speed, strength and attention.