Not Your Father's Jog: Underwear Run Along the Danube in Serbia

Most people hide their trunks and swimsuits until summer, while others prolong their swimming season until winter. According to the event's organisers, controlled exposure to the cold is the best way to strengthen the immune system and rejuvenate the body. Participants in the Underpants Run on the banks of the Danube River say that they do not run for the sake of victories and records but in order to cheer up others.

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Runners take part in an Underpants Run on the banks of Danube River in Belgrade on 26 January 2019, while outside temperatures approach zero degrees Celsius.

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A participant dives into the snow during the annual winter Underpants Run in Belgrade, Serbia on 26 January 2019.

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Runners warm up before taking part in an Underpants Run on the banks of Danube River in Belgrade on 26 January 2019, while outside temperatures approach zero degrees Celsius.

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A participant competes in the annual winter Underpants Run in Belgrade, Serbia on 26 January 2019.

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Participants run in the annual winter Underpants Run in Belgrade, Serbia on 26 January 2019.

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Runners take part in an Underpants Run on the banks of Danube River in Belgrade on 26 January 2019, while outside temperatures approach zero degrees Celsius.

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Runners take part in an Underpants Run on the banks of Danube river in Belgrade on 26 January 2019, while outside temperatures approach zero degrees Celsius.

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Runners take part in an Underpants Run on the banks of Danube river in Belgrade on January 26, 2019, while outside temperature approaches zero degree Celsius

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Participants compete in the annual winter Underpants Run in Belgrade, Serbia on 26 January 2019.