Those summertime outdoor neighborhood swimming pools are never more crowded than during the practice times during meets. They are packed with swimmers, crowded in each of the six lanes as they practice their various strokes for the upcoming competition.
If the meet includes multiple teams, like at a six-team divisional competition, for example, each team is assigned a specific lane for warmups. Sometimes those warmups include just swimmers of certain age groups. But other times all age groups will squeeze into a lane at the same time.
When that happens, there has to be organizations to the warmps, otherwise swimmers would continuously crash into each other.
So sometimes swimmers will stand in a line during those warmups waiting for their time to practice whatever stroke, turn or flip turn.
Those warmup sessions can be entertaining to watch, that is if the swimmers can be seen at all with all of the splashing from the multiple of humans in the water, and all trying to swim, at the same time.
– Dave Facinoli