Funding for this research was provided by:
The Japan Society Promotion of Science Grant-in-Aid for Scientific Research (JP18K10838)
Received: 21 October 2020
Accepted: 31 January 2021
First Online: 10 February 2021
Ethics approval and consent to participate
: We ensure that this work has been carried out in accordance with the Code of Ethics of the World Medical Association (Declaration of Helsinki) for experiments involving humans, and informed consent was obtained from all participants. The study protocol was approved by the Ethics Committee of the National Institute of Fitness and Sports in Kanoya.
: This is not applicable as the study does not have individual person’s data.
: The authors declare that they have no competing interests.