Nike's controversial Vaporfly shoes will not be banned. Instead, all prototype technology not currently on the market will be temporarily suspended, The Guardian reports

Crystal Cox/Business Insider

• The man and woman who hold the marathon world records both compete in Nike Vaporfly shoes.
• Vaporflys give runners more energetic efficiency because the shoes' foam-and-carbon sole ensures less energy is lost with each step.
• Some researchers and runners think the thickness of the shoes' midsoles should be regulated to avoid unfair advantages.
• The Guardian reported Tuesday that the World Athletics organization (which oversees most international track and field events) will not be imposing a blanket ban on Nike Vaporfly shoes.
• Rather, World Athletics is expected to announce a temporary halt to all new shoe technology ahead of the Tokyo Olympics this summer, according to The Guardian.
• The official decision from World Athletics will be announced Friday.
• Visit Business Insider's homepage for more stories.

The man and woman who hold the world records for fastest marathon have something in common: They both compete in Nike Vaporfly shoes.

Both independent and Nike-sponsored studies have showed that the shoes increase athletes' energetic efficiency by 4% or more. Some runners and experts say the footwear confers an unfair advantage and should be regulated.

See the rest of the story at Business Insider

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SEE ALSO: Nike's controversial Vaporfly shoes powered the world's 2 fastest marathoners to victory. When I tried them, it felt like running on rocking horses.

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