The article presents the results of a study of students' health in terms of cardiovascular system indicators in conditions of distance learning and self-isolation during the period of COVID-19. The analysis of circus-septal (near-weekly) rhythms in students revealed the dominance of synchronization of indicators of the cardiovascular system in conditions of distance learning. It indicates that the students chose the same mode of educational activity, living independently of each other at a considerable distance, and it turned out to be safe for the cardio-respiratory system of students. The data obtained make it possible to recommend a combination of traditional and distance learning modes using modern IT technologies, subject to the development of sanitary and hygienic standards that are safe for health.