If you happen to break a swimming-related world record at an Olympic Games any time soon, then you'll have to follow a bizarre rule for it to be verified by the sport's governing body.
In total, there was a whopping 37 swimming events across 13 days of action at the 2024 Paris Olympics, as Leon Marchand, Daniel Wiffen and Pan Zhanle made a splash in the Paris La Defense Arena.
Marchand, 22, established himself as the face of Paris 2024 and became the first French Olympian to win four gold medals at the same Games, shattering an Olympic record each time.
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What many people don't know is that Marchand had to submit their records via fax.
That's right. Despite advances in technology, swimmers who set world records must send a fax for it to be verified by the sport's governing body, World Aquatics, which was formerly known as FINA.
Away from the post-race fax and most competitors at the Paris Games – and indeed previous Olympics – wore two swimming caps to allow them to cut through the water with as little drag as possible.
Less drag equals swimming with greater efficiency, which allows competitors to reach a higher speed and clock a faster race time.
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There were also a number of unusual rules in force at the Paris Olympics, including gymnasts being forbidden from wearing any vibrant nail polish, BMX riders having to tuck in their shirts at all times and wrestlers being required to carry a handkerchief in case they need to mop up any blood.
Water polo players were also required to have their toe nails checked to prevent them scratching any competitors.
Dom Aldworth, a brand marketing expert at Gambling Zone, gave an insight into the rules.
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He explained: "The Olympics captivate a global audience by showcasing the pinnacle of human athletic achievement and fostering a unique sense of global unity and sportsmanship.
"The diverse range of sports ensures something for everyone. Rules play a crucial role in maintaining the integrity of the Olympics. They ensure safety, allowing athletes to perform at their best without undue risk."
He added: "Regulations promote discipline and respect, while upholding fairness provides a level playing field. This combination of safety, discipline, and fairness is essential for athletes and viewers alike, making the Olympics a cherished global event."
Jack Kenmare