Still, with SARS , it is recommended to rest, and nothing better has yet been invented to combat such infections. If you have more than a runny nose and a sore throat and ignore this advice, you can sometimes backfire. According to the head of the admission department of the clinic of the Children's Scientific and Clinical Center for Infectious Diseases of the Federal Medical and Biological Agency of Russia and the pediatrician of the Rassvet clinic, Valentin Kovalev, some viruses, such as the influenza virus, Coxsackie enteroviruses and ECHO (they can cause ARVI), can not only lead to aggressive current infections, but also cause . “These viruses can damage muscle cells (myocytes), including heart muscle cardiomyocytes,” explains Dr. Kovalev. - Often this process proceeds subacutely and without specific symptoms. Increased physical activity at this point will lead to damage to muscle cells. Therefore, it is not worth participating in competitions.