The research was conducted at Ho Chi Minh City University of Physical Education and Sports (HCM UPES) to bridge the gap about the application of AI tool - ChatGPT in students’ practice of writing skills in the physical education university context. The study tried to apply ChatGPT in a seven-week writing practicum. The researcher, who is also the lecturer in charge of English module two, introduced and guided students to use ChatGPT when they conducted their writing task in four units. Students then answered the questions in the survey and took part in face-to-face interviews about using ChatGPT when they practiced writing skills. Data for the research was collected from students’ test results (before and after ChatGPT was put into use), students’ feedback through surveys and face-to-face interviews. The results showed that using ChatGPT positively affected UPES students’ practice of writing skills. This result created more motivation for lecturers to conduct further research and introduce and apply AI technologies to students in their teaching practice.