The study involved 20 students involved in athletics and qualifying for long-distance
running (group A (n=10) – II adult category, group B (n=10) – I adult category and above). The experiment used running tests
on a treadmill, during which a complex of cardiorespiratory, metabolic and motor characteristics were recorded. Long-distance
running is characterized by maximum mobilization of body systems. The study made it possible to establish that an increase
in most of the studied physiological indicators indicates an increase in the functional capabilities of those involved, and
with an increase in the preparedness of athletes, the energy cost of running decreases and the ratio of aerobic and anaerobic
components of energy supply changes towards an increase in the share of the anaerobic component.