 Self-isolation was implemented in January 2020 as a response to the spread of COVID-19. It had never been done before in human history, forcing billions of people to stay at home for several months. Governments assessed the sanitary hygienic conditions of self-isolation, which became an essential issue. We propose a definition for sanitary hygienic self-isolation and develop methods for assessing its hygiene levels. The household member's self-isolation index point score, HMSI, is calculated based on the number of self-isolated household members, their physical activity, the size of their indoor space, the amount of time they spend outside, and the frequency of domestic disputes. This score is inversely proportional to the calories consumed by the household members. HMSI can determine whether the self-isolation of the household members is optimal, favourable, or unfavourable. Additionally, the assessment of the functional reserves of the household members can be used to prevent cardiovascular, alimentary dependent diseases, and musculoskeletal system disorders. Furthermore, self-is. This article was authored by Oleg Mitrikin, Elena Bolova, Ali Alsak, and others. We are article.tv, links in the description below.