Data on the prevalence of hypodynamia among individuals with the first and second episodes of spontaneous venous thrombosis in a population sample of Moscow residents are compared. It is stressed that changes in behavioral stereotype, which determine the reduction of physical activity level before the first episode, are significant for the risk of rethrombosis. Besides, the authors discuss a range of questions concerning terminology of low physical activity, distinguishing the reasons for hypodynamia, and evaluation of existing questionnaires for measuring the levels of physical activity.
