The practice of physical activity is important in the prevention of chronic diseases, and its investigation is valid to encourage healthy habits among teachers. This study aimed to identify factors associated with insufficient physical activity in Brazilian school teachers through an integrative review of articles published from 2009 to 2019 in the Lilacs, SciELO, DOAJ, PubMed, Dialnet, and Web of Science databases, through combinations of the exact descriptors and synonyms in English and Portuguese, using the terms "School Teachers", "Physical Activity", and "Brazil". Most teachers are insufficiently active and, among the factors associated with this condition, are overweight, high body mass, a higher percentage of fat, chronic pain, problems related to voice, smoking, and occupational factors, such as overwork, temporary contract, lack of autonomy, and standing time. [ABSTRACT FROM AUTHOR]