Evaluation of the effectiveness of using the method of "Circle training" and the method of "Distance training" to improve the physical fitness of intensive athletics students at Hanoi University of Physical Education and Sports. jstsc [Internet]. 2019 Dec. 12 [cited 2025 Mar. 11];1(Đặc biệt):406. Available from: https://tckhupes1.edu.vn/index.php/upes1/article/view/1816