A runner competes in the Great Wall Marathon at the Huangyaguan Great Wall outside Beijing, China, May 18, 2019. (Photo by Thomas Peter/Reuters)

Runners dressed in Christmas-themed outfits compete during a charity Santa run in Shanghai, China, November 29, 2015. (Photo by Aly Song/Reuters)

Some runners fall during the “El Pilon” running-the-bulls in the village of Falces, Navarra, northern Spain, 16 August 2022. “El Pilon” running-the-bulls is held on a hill where runners have to avoid the herd of cows on a 800 meter long and narrow slope with the mountain on one side and a steep cliff on the other. (Photo by Peio H/EPA/EFE)

An unidentified runner gestures while being attended by medical services following the first running of the bulls of the San Fermin festival in Pamplona, northern Spain, July 7, 2015. Two runners were gored in the run that lasted 2 minutes and 23 seconds, according to local media. (Photo by Eloy Alonso/Reuters)

Runners cross the Verrazano-Narrows Bridge shortly after the start of the New York City Marathon in New York, November 2, 2014. (Photo by Lucas Jackson/Reuters)

“As you can see I love the Icelandic Horse. Born and raised with them, I love to work with them and watch them ... they have unbelievable network of communication and energy I can´t explain with words”. – Gigja Einarsdottir. Photo: “Runners”. (Photo by Gigja Einarsdottir)

An iguana in Bali helped Julij Kopilović, age eight, from Slovenia, earn second runner-up in Amazing Animals. (Photo by Julij Kopilović/National Geographic)

A runner participates in the Santa Run 10K race in Caracas, Venezuela, Sunday, December 19, 2021. This is the first Santa Run since the start of the pandemic. (Photo by Ariana Cubillos/AP Photo)