Introduction: The student's environment is a set of stressors in the field of human ecology, containing the genetic and epigenetic factors within its limits.
Material and Method: The body posture tests were carried out in a group of 65 students aged 7 years, using the projection moiré method in 4 positions: 1st – the habitual posture, 2nd- the posture after a-10-minutes-loadwith school items container 3rd–the posture after one minute of the load removal, 4th – the posture after two minutes of the load removal. Physical fitness was measured with the modified Sekita test.
Results: The values of the body posture features were analyzed to determine the significance differences between consecutive measurements and their relationship with the values of physical fitness features.
Conclusion. (1) The way of carrying school items obliquely on the left or right shoulder and at the heteronymous hip can cause significant adaptive changes in the skeletal and muscular system. It should be assumed that the bigger these changes are, the longer the carrying time is, the greater the mass of the container and the intensity of physical effort are. The changes are not contingent on gender. (2) The level of general physical fitness shows a gender-specific relationship with the magnitude of changes in the body posture. The relationship is greater among boys. (3) School items should not be obliquely carried on the left or right shoulder and at the heteronymous hip by7-year-old children.
