MOSCOW, 20 Jan. Hardening is the most affordable way to strengthen the immune system, speed up the metabolism, make the body less susceptible to SARS and improve sleep, said Anna Efimova, a general practitioner. According to her, you can start with dousing with cold water. «Lower the temperature of the water by two degrees. Using a ladle, slowly pour over the calves and shins, then go to the thighs and only then to the back. After a week, you can lower the temperature by two degrees. Do not immediately arrange an ice shower for yourself — you most likely , catch a cold, but you will not benefit,» the agency's interlocutor said.
