EN
Background. Physical activity of children and adults is considered an essential health determinant. Nowadays a considerable number of children and adolescents live sedentary lifestyles, and, as a result, more frequently suffer from the metabolic syndrome, cardiovascular diseases, overweight and obesity. It is generally believed that a significant number of children abstain from exercising at school. However, representative research results are still unavailable. The aim of the present study was to estimate the extent of exercise avoidance at physical education lessons in primary schools, and to identify the factors increasing the proportion of nonexercisers. Material and methods. The investigations were carried out in 42 primary schools of the Province of Silesia; 1333 physical education lessons were surveyed (classes 4-6). Results. The mean percentage of nonexercisers was 9.2%. The proportion of girls abstaining from exercise was significantly higher and amounted to 13.7%. A lower percentage of non exercising pupils, i.e., 8.5%, was noted in mixed schools. The most common excuses from active participation in physical education lessons were leaving exercise clothes at home (45%) and excuse notes from parents (33.5%).