Zelenograd resident Sergei, a robot technician, an entrepreneur, has been engaged in winter swimming for about five years.

Every winter day he comes to Chyornoye Lake to keep the body healthy.

A small group of «walruses» (as we in Russia call people engaged in winter swimming) has formed in the 6th microdistrict - they maintain the ice holes in the proper form.

Dmitry EROKHIN