KRIVTSUN-LEVSHINA, L., and V. KRYVTSUN. “METHODOLOGICAL APPROACH TO ANALYSIS PERSONAL ACTIVITY IN THE FIELD OF PHYSICAL CULTURE”. Vestnik of Polotsk State University. Part E. Pedagogic Sciences, no. 7, June 2021, pp. 78-86, https://journals.psu.by/pedagogical/article/view/837.