The aim of the research was to get information about physical activity and forms of spending leisure time by teenagers between 13 and 15 years old, who live in Biala Podlaska. The research included 229 pupils from three Grammar Schools (115 girls and 114 boys). The range of respondents’ age is from 13 to 15 years old. The research tool was anonymous questionnaire consisting of questions concerning healthy lifestyle, physical activity and forms of spending leisure time. In total, the questionnaire consisted of 17 both open and close questions. On the basis of the questionnaire, it was proved that pupils’ knowledge on physical education and health is low (37-47% of correct answers). Young people more and more often choose passive forms of activity. Boys much more often take up active forms of exercise than girls. Teenagers devote most time to physical activity, the development of interests and taking care of one’s own appearance.