1. Ministry of Education, Culture, Sports, Science, and Technology . Course of study for elementary schools, section of physical education (in Japanese). Accessed June 22, 2019. http://www.mext.go.jp/component/a_menu/education/micro_detail/__icsFiles/afieldfile/2009/04/21/1261037_10.pdf
Google Scholar2. Morifuji, T, Nakao, H, Inaba, T, Kasubuchi, K, Hashimoto, M, Kaneko, M. Side-to-side differences in range of motion, muscle strength, and medial elbow laxity in young baseball players with medial elbow injuries. J Phys Fit Sports Med. 2017;6(4):233-239. doi:10.7600/jpfsm.6.233
Google Scholar | Crossref3. Rebar, R, Feingold, KR, Anawalt, B, et al. Evaluation of amenorrhea, anovulation, and abnormal bleeding. In: Feingold, KR, Anawalt, B, Boyce, A, et al. (eds) Endotext. MDText.com, Inc; 2018:10-12.
Google Scholar4. De Souza, MJ, Williams, NI, Nattiv, A, et al. Misunderstanding the female athlete triad: refuting the IOC consensus statement on relative energy deficiency in sport (Red-S). Br J Sports Med. 2014;48:1461-1465. doi:10.1136/bjsports-2014-093958
Google Scholar | Crossref | Medline5. Micheli, LJ, Ireland, ML. Prevention and management of calcaneal apophysitis in children: an overuse syndrome. J Pediatr Orthop. 1987;7(1):34-38. doi:10.1097/01241398-198701000-00007
Google Scholar | Crossref | Medline6. Kaufman, KR, Brodine, SK, Shaffer, RA, Johnson, CW, Cullison, TR. The effect of foot structure and range of motion on musculoskeletal overuse injuries. Am J Sports Med. 1999;27(5):585-593. doi:10.1177/03635465990270050701
Google Scholar | SAGE Journals | ISI7. Cassas, KJ, Cassettari-Wayhs, A. Childhood and adolescent sports-related overuse injuries. Am Fam Physician. 2006;73(6):1014-1022.
Google Scholar | Medline | ISI8. Fujisawa, A . Health-sense of junior tennis player. Departmental bulletin paper of Mukogawa Women’s University (in Japanese). Accessed May 19, 2019. https://mukogawa.repo.nii.ac.jp/?action=pages_view_main&active_action=repository_view_main_item_detail&item_id=611&item_no=1&page_id=28&block_id=33;4:%20p.%2081-91
Google Scholar9. Japan Sports Agency . Comprehensive guidelines on the state of athletic club activities (in Japanese). Accessed May 10, 2019. http://www.mext.go.jp/sports/b_menu/shingi/013_index/toushin/__icsFiles/afieldfile/2018/03/19/1402624_1.pdf
Google Scholar10. Ekelund, U, Sardinha, LB, Anderssen, SA, et al. Associations between objectively assessed physical activity and indicators of body fatness in 9- to 10-y-old European children: a population-based study from 4 distinct regions in Europe (the European Youth Heart Study). Am J Clin Nutr. 2004;80(3):584-590. doi:10.1093/ajcn/80.3.584
Google Scholar | Crossref | Medline11. Hayashi, S, Shibata, T, Samejima, H. Child locomotive syndrome and school medical examination of locomotive organs. J Jpn Orthop Assoc. 2017;91:338-344.
Google Scholar12. Public interest foundation corporation “Bone and Joint Japan” home page (in Japanese) . Accessed March 27, 2020. https://www.bjd-jp.org/wp/wp-content/uploads/2019/04/2019.pdf
Google Scholar13. Ministry of Education, Culture, Sports, Science, and Technology . Partial revision of the enforcement regulations of the School Health and Safety Act (notification) (ministerial ordinance: legal documents) (in Japanese). Accessed March 27, 2020. https://www.mext.go.jp/b_menu/shingi/chukyo/chukyo0/gijiroku/__icsFiles/afieldfile/2017/09/29/1396817_20_2.pdf
Google Scholar14. Tanaka, S, Todo, M, Nakamura, M, Morihara, T, Hojo, T. Relationship between the results of musculoskeletal examination and the Rohrer Index in elementary school students. Doshisha J Health Sports Science. 2015;30(7):23-24.
Google Scholar15. Ministry of Education, Culture, Sports, Science, and Technology . Handbook for approach to improve children’s physical strength (in Japanese). Accessed August 1, 2020. https://www.mext.go.jp/a_menu/sports/kodomo/zencyo/1321132.htm
Google Scholar16. Implementation guideline for new children’s physical fitness test (in Japanese) . Accessed March 27, 2020. https://www.mext.go.jp/sports/b_menu/toukei/kodomo/zencyo/1411922_00001.html
Google Scholar17. Questionnaire for screening of locomotive disorders in elementary school children (in Japanese) . Accessed August 1, 2020. https://www.bjd-jp.org/wp/wp-content/uploads/2020/01/surveysheets.pdf
Google Scholar18. Tokumura, M . Medical examination of bone and joint in school by non-orthopedic school doctor. J Pediatr Health Res. 2012;71(3):350-353.
Google Scholar19. Ito, S, Fukumoto, T, Imagita, H. Relation between the height–weight ratio and physical fitness among Japanese elementary school students. J Physic Educ Sport. 2020;20(2):690-706. doi:10.7752/jpes.2020.02101
Google Scholar | Crossref20. Wind, AE, Takken, T, Helders, PJM, Engelbert, RHH. Is grip strength a predictor for total muscle strength in healthy children, adolescents, and young adults? Eur J Pediatr. 2010;169(3):281-287. doi:10.1007/s00431-009-1010-4
Google Scholar | Crossref | Medline | ISI