1. 1) The Ministry of Health, Labor, and Welfare. Retrieved August 8, 2016 from https://www.mhlw.go.jp/wp/hakusyo/kousei/14/dl/1-02-1.pdf (in Japanese).
2. 2) Ministry of Health, Labor and Welfare in Japan. 2017. National Health and Nutrition Survey. Retrieved August 8, 2019 from https://www.mhlw.go.jp/content/000451755.pdf (in Japanese).
3. 3) Japan Sports Agency. Retrieved August 8, 2019 from http://www.mext.go.jp/sports/b_menu/houdou/30/02/__icsFiles/afieldfile/2018/05/02/1401750_01.pdf (in Japanese).
4. 4) Nakao C, Yamada E, Fukaya M, Tayama K, Tsukamoto Y and Sato Y. 2001. Effect of acetate on glycogen replenishment in liver and skeletal muscles after exhaustive swimming in rats. Scand J Med Sci Sports 11: 33-37. doi: 10.1034/j.1600-0838.2001.011001033.x.
5. 5) Nakao C, Oshida Y and Sato Y. 1998. Effects of fluid replacement after moderate exercise -comparison between water, glucose, citric acid and vinegar-. Descente Sports Science 19: 59-68.