a concept that includes a set of movements performed by a person in the process of his life. The criterion of motor activity is the duration of the motor component in the daily time budget, expressed in units of time (minutes, hours) or as a percentage in relation to the length of the day, as well as the number of movements of the body in space (locomotion) per unit of time or the sum of movements in terms of the kilometer of locomotion. There are various methods of quantitative measurement of motor activity: questionnaires, timing, pedometry, calculation of daily energy expenditure, etc.