Tempered by the Cold: Meet Intrepid 'Submergents' from Minnesota Unafraid to Plunge Into Icy Waters

Such procedures are believed to boost the immune system, make one's body more resistant to various infections and more adaptable to harsh climate conditions. It is also believed to have benefits for the cardiovascular system. However, one should remember that before venturing out to swim at low temperatures, it is advisable to seek medical advice, as such a procedure could have negative effects for people with various conditions.

Watch the "Submergents" plunge into the cold water at Lake Harriet in Minneapolis in Sputnik's photo gallery.

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A member of the "Submergents" group comes out of 37.4°F (3°C) water after taking the plunge in a "pool" carved from the ice on Lake Harriet in Minneapolis, Minnesota, on 30 January 2021. Members meet up early every morning to plunge into the cold water for three minutes and some up to 17 minutes. The submergents say the practice has various health benefits.

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Bradley, a member of the "Submergents" group comes out of 37.4°F (3°C) water after taking the plunge in a "pool" carved from the ice on Lake Harriet in Minneapolis, Minnesota, on 30 January 2021. Members meet up early every morning to plunge into the cold water for three minutes and some up to 17 minutes. The submergents say the practice has various health benefits.

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Members of the "Submergents" carve a "pool" from the ice on Lake Harriet in Minneapolis, Minnesota, on 30 January 2021.

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Members of the "Submergents" water after taking the plunge in a "pool" carved from the ice on Lake Harriet in Minneapolis, Minnesota, on 30 January 2021. Members meet up early every morning to plunge into the cold water for three minutes and some up to 17 minutes. The submergents say the practice has various health benefits.

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Nick (L) and Bradley (R), members of the "Submergents" group taking the plunge in a "pool" carved from the ice on Lake Harriet in Minneapolis, Minnesota, on 30 January 2021. Members meet up early every morning to plunge into the cold water for three minutes and some up to 17 minutes. The submergents say the practice has various health benefits.

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Members of the "Submergents" group swimming in a "pool" carved from the ice on Lake Harriet in Minneapolis, Minnesota, on 30 January 2021. Members meet up early every morning to plunge into the cold water for three minutes and some up to 17 minutes. The submergents say the practice has various health benefits.

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Members of the "Submergents" group remove ice from the "pool" as they get ready to take the plunge into 37.4°F (3°C) water on Lake Harriet in Minneapolis, Minnesota, on 30 January 2021. Members meet up early every morning to plunge into the cold water for three minutes and some up to 17 minutes. Submergents say the practice has various health benefits.

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Members of the "Submergents" group take the plunge into 37.4°F (3°C) water in a "pool" carved from the ice on Lake Harriet in Minneapolis, Minnesota, on 30 January 2021. Members meet up early every morning to plunge into the cold water for three minutes and some up to 17 minutes. Submergents say the practice has various health benefits.

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Members of the "Submergents" walk to the "pool" as they prepare to plunge into 37.4°F (3°C) water on Lake Harriet in Minneapolis, Minnesota, on 30 January 2021. Members meet up early every morning to plunge into the cold water for three minutes and some up to 17 minutes. Submergents say the practice has various health benefits.