The purpose of the article was to experimentally evaluate the effectiveness of using a comprehensive strength training program for orienteering athletes 18-20 years old based on the CrossFit system. Competitive activity in orienteering is characterized by intense physical activity associated with movement over rough terrain with various types of soil and landforms (tall grass, blowdown, stone rivers, swamps, etc.) and intense mental activity, including a set of operations that provide targeted movement in unfamiliar areas using a sports map and compass.

The functional status of the heart and central nervous system in athletes and untrained students aged 18-20 years was studied after local physical exertion and cognitive tests. The results revealed an increase in heart rate and blood pressure, as well as the amplitude of the mode and stress index in heart rhythm, which indicates a different degree of functional stress in all subjects during all tests. The features of increasing situational anxiety and slow EEG rhythms in athletes and untrained students were also identified. Given the functional tension of the heart and central nervous system, psychophysical correction of the body using relaxation techniques is recommended for the prevention of overstrain.