The aim of this study is to identify and classify the factors affecting the effectiveness of physical education in primary school girls during the coronavirus outbreak. Research methodology: The qualitative research approach and its strategy are phenomenological. The statistical population includes all physical education teachers in primary school girls in Ardabil city, from whom participants were selected using purposive sampling. The sample size depended on theoretical saturation, and the researcher reached theoretical saturation at fifteen participants and stopped continuing the interview. The data collection tool was a semi-structured interview. While observing research ethics and maintaining confidentiality, the interviews were recorded and then implemented and typed in Office software while maintaining confidentiality. At the end, the interview files were transferred to MAXQDA20 software and then open and axial coding was performed. In this study, the external reviewer method was used to examine the validity of the research, and to examine the reliability of the research, after three experts had coded the data, inter-coder reliability was used, and the Cohen's kappa reliability coefficient between the evaluators and the researcher was above 0.90 in all interviews, indicating the reliability of the analysis. Findings: In the open coding stage, 79 initial concepts were extracted. In the next step, the identified codes were categorized and combined based on the degree of conceptual similarity and extracted in the form of four sections of the physical education system in schools during the Corona period. Conclusion: In order to improve the effectiveness of physical education in schools, it is important to pay attention to the codes mentioned in this study in the four sections of the process, output, input, and feedback of the virtual education system.