Other pools which host events under FINA regulations are required to meet some but not all of these requirements. Many of these pools have eight, or even six, instead of ten lanes and some will be 25 meters (82 ft) long, making them Short course. World records that are set in short course pools are kept separate from those set in long course pools because it may be an advantage or disadvantage to swimmers to have more or less turns in a race.
Competitive swimming, from the club through to international level, tends to have an autumn and winter season competing in short course (25 meters or yards) pools and a spring and summer season competing in long course (50-meter) pools and in open water .
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