1Institutes of Physical Education, Changzhou University, Changzhou, Jiangsu, China 2School of Physical Education, Shanghai University of Sport, Shanghai, China 3People’s Liberation Army Unit 63613, Gansu, Lanzhou, China DOI 10.7717/peerj.17961 Academic Editor Octavio Barbosa Neto Subject Areas Epidemiology, Psychiatry and Psychology, Public Health, Mental Health, Sports Medicine Keywords Physical activity, Anxiety levels, Emotion regulation, Mediating role, College students Copyright ©...