References
Al-Samarraie, H., & Srinagesh, P. (2018). Flexibility in E-Learning: A Review of Literature. Journal of Educational Technology Systems, 46(4), 491-517.
Hrastinski, S., & Dennen, V. P. (2019). Online education. In R. A. Dwyer, D. P. G. Stoltz, D. S. Maki, & K. E. Johnson (Eds.), The Handbook of Distance Education (4th ed., pp. 169-184). Routledge.
Kim, K. J., Liu, S., & Bonk, C. J. (2005). Online MBA students' perceptions of online learning: Benefits, challenges, and suggestions. Internet and Higher Education, 8(4), 335-344.
Li Liwei. Research on the influence of the application of "Campus Run" app on college students' extracurricular sports behaviors [D]. Hebei Normal University, 2019.
Sánchez-Alonso, S., & Olmos-Migueláñez, S. (2019). Flexibility in online learning: An analysis of student experiences. Distance Education, 40(1), 22-39.
Smith, N., & Lounsbery, M. (2009). Promoting Physical Education. Journal of Physical Education, Recreation & Dance, 80:1, 39-43.
Song Qi. Research on the influence of sports apps on college students' persistence in physical exercise [D]. Huazhong Normal University, 2016.
Wang Miao. Research on the Communication Effect of Sports APP [J]. Science and Technology Communication, 2015, (3).
Wei Huilin, Song Yumei, Chen Jie. Research on Running APP [J]. Sports Culture Guide, 2017 (07): 190-195.
Yang, Y., & Cornelious, L. F. (2018). Examining the effects of individual learner differences on flexible e-learning outcomes. Journal of Educational Technology Development and Exchange, 11(1), 1-22.
Zhang Yan, Meng Wei. The APP Age of Dealers [J]. Operators (auto business review), 2013 (3): 138-142.