Children watch their classmate pour cold water on herself under the watch of a fitness coach at a local kindergarten in Russia's Siberian city of Krasnoyarsk, March 11, 2015. The program, which also involves sports training and sauna usage, has been practiced by the kindergarten for more than 15 years as they believe it has health benefits and keeps the children fit. Children start pouring cold water on themselves outdoors after about three years of training and undergoing medical tests, and the kindergarten is the only one in the region that practices these exercises, according to employees. (Photo by Ilya Naymushin/Reuters)

Children pour cold water on themselves under the watch of fitness coach Oksana Kabochko (L) at a local kindergarten in Russia's Siberian city of Krasnoyarsk, March 11, 2015. (Photo by Ilya Naymushin/Reuters)

Children run barefoot on snow after pouring cold water on themselves at a local kindergarten in Russia's Siberian city of Krasnoyarsk, March 11, 2015. (Photo by Ilya Naymushin/Reuters)

Zinaida Bulygina (bottom), 65, and local children, members of a winter swimmers family club, warm up before swimming in the icy waters of the Tuba river in the Kuragino village, southeast of the Russian Siberian city of Krasnoyarsk, March 17, 2015. The “Ldinka” (Ice Floe) club, founded by Zinaida Bulygina, a former champion of the USSR in winter marathon swimming, in 1993 is the first winter swimmers association in the countryside districts of the region. About 70 local residents of different ages, who think that winter swimming has health benefits and keeps people fit, are permanent members of the club nowadays. (Photo by Ilya Naymushin/Reuters)

Zinaida Bulygina (R), 65, leads a group of local children, members of a winter swimmers family club, after leaving a sauna before swimming in the icy waters of the Tuba river in the Kuragino village, southeast of the Russian Siberian city of Krasnoyarsk, March 17, 2015. (Photo by Ilya Naymushin/Reuters)

Zinaida Bulygina (2nd L), 65, leads a group of local children, members of a winter swimmers family club, after leaving a sauna before swimming in the icy waters of the Tuba river in the Kuragino village, southeast of the Russian Siberian city of Krasnoyarsk, March 17, 2015. (Photo by Ilya Naymushin/Reuters)

Zinaida Bulygina (L), 65, helps local children, members of a winter swimmers family club, to immerse in the icy waters of the Tuba river in the Kuragino village, southeast of the Russian Siberian city of Krasnoyarsk, March 17, 2015. (Photo by Ilya Naymushin/Reuters)

Pyotr Syomin, a 11-year-old member of a winter swimmers family club, practices yoga after swimming in the icy waters of the Tuba river in the Kuragino village, southeast of the Russian Siberian city of Krasnoyarsk, March 17, 2015. (Photo by Ilya Naymushin/Reuters)

Zinaida Bulygina (R), 65, talks to local children, members of a winter swimmers family club, who warm up before before swimming in the icy waters of the Tuba river in the Kuragino village, southeast of the Russian Siberian city of Krasnoyarsk, March 17, 2015. (Photo by Ilya Naymushin/Reuters)

Zinaida Bulygina (C), 65, Ludmila Timofeeva (L), 53, and Anna Ushayeva, 65, members of a winter swimmers family club, swim in the icy waters of the Tuba river in the Kuragino village, southeast of the Russian Siberian city of Krasnoyarsk, March 17, 2015. (Photo by Ilya Naymushin/Reuters)