Similar Patterns of Dysautonomia in Myalgic Encephalomyelitis/Chronic Fatigue and Post-COVID-19 Syndromes.

Background: There is a considerable overlap between the clinical presentation of post-COVID-19 condition (PCC) and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). Many of their common symptoms can be linked to dysregulation of the autonomic nervous system (dysautonomia). This study aimed to objectively assess autonomic function in a general group of patients with PCC and in a group of patients with ME/CFS whose disease was not related to COVID-19.

[Diagnosis of fragility and age resilience from a dynamical systems perspective.].

The concepts of fragility and resilience are often used together to describe elderly people with reduced physical activity. While fragility, which develops with the aging of the body, is a biological syndrome of a decrease in the stressors response resulting from cumulative regression in many physiological systems, and age related a comprehensive assessment of the ability resistance to stress. In this regard, it is important to develop systems and scales for the identification groups of risk among the elderly.

[Age-related resilience as a manifestation of neurovegetative regulation of organism's functions.].

The concept of human resilience was created to search for new approaches to improving the well-being of middle-aged, elderly and old people. Resilience is based on the physiological mechanisms of maintaining homeostasis and the ability of organs and tissues to regenerate. Identifying the correlation between environmental factors and the level of reactivity of the body is an important aspect in assessing viability.