Funding for this research was provided by:
National Planning Office of Philosophy and Social Science (16ZDA227)
Pujiang Program (16PJC075)
Local University Development Program (16080503400)
Shanghai Key Laboratory of Human Performance (11DZ2261100)
Text and Data Mining valid from 2018-11-22
Received: 24 June 2018
Accepted: 30 October 2018
First Online: 22 November 2018
Ethics approval and consent to participate
: The study protocol and procedure were approved by the Institutional Review Board (IRB) of the Shanghai University of Sport (SUS), and permission to conduct the study was obtained from the teachers and principals of the participating schools. The IRB of SUS approved that the verbal consent is sufficient to conduct this study due to the fact that none of survey items related to personal ethic issue. All the children involved in the study, and their parents or guardians, were specifically advised that participation was completely voluntary. Verbal informed consent was obtained from all parents or guardians, and positive assent was obtained verbally from all the children prior to data collection. Data were collected and analysed anonymously.
: Not applicable.
: The authors declare that they have no competing interests.
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