My kids swim club is small and they swim in a 25m pool, once a day. So max 5 days, 20kms. Bigger clubs have 50m pools and kids will typically swim up to twice a day and almost double the volume. So it was good to have a couple of our kids get podium spots at the recent state championships, one of the boys got a first and second in 200m and 100 back. A huge achievement considering how much more volume the other kids are swimming. The head coach is very big on technique, always pulling the kids out the pool to address any stroke issues, a job made much easier by being in a 25pool. We have lost quite a few kids to bigger clubs, they think they need to train more. Not saying kids won't get quick with volume, but they run the risk of burn out plus injury. You could see some of the quick kids at the meet did not have the best stroke compared to some of our kids. Food for thought!