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Authors
Miyata, Hiromitsu http://orcid.org/0000-0003-0091-5705
Kobayashi, Daisuke
Sonoda, Akifumi
Motoike, Hibiki
Akatsuka, Saki
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Funding
Funding for this research was provided by:
Waseda University Grants for Special Research Projects (2018A-005, 2019E-016)
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Article History
Received: 28 May 2020
Accepted: 2 December 2020
First Online: 7 December 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Review Committee on Research with Human Subjects of Waseda University (Approval No. 2018–218). All practitioners of martial arts gave written informed consent upon agreement to participate. All non-practitioners checked a box on the online survey to indicate agreement to participate, immediately before starting the survey.
: All participants provided informed consent to have their anonymized information published.
: The authors declare that they have no competing interests.
