Hagiwara, Goichi, Daisuke Akiyama, Takaaki Tsunokawa, and Hirotoshi Mankyu. 2019. “Effectiveness of Motivational Videos for Elite Swimmers: Subjective and Biological Evaluations”. Journal of Human Sport and Exercise 14 (2proc):S178-S188. https://doi.org/10.14198/jhse.2019.14.Proc2.04.