{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T09:36:38Z","timestamp":1769160998276,"version":"3.49.0"},"reference-count":47,"publisher":"Public Library of Science (PLoS)","issue":"1","license":[{"start":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T00:00:00Z","timestamp":1769040000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"\n Background<\/jats:title>\n China\u2019s national school health policies face persistent implementation gaps, particularly in rural high schools prioritizing Gaokao. National surveys (2010\u20132019) documented alarming fitness declines: 50-m sprint speeds decreased (+0.3s boys;\u2009+\u20090.4s girls), pull-ups\/sit-ups fell 29%\/20%, and standing jumps shortened 6\u20137\u2009cm.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n A 16-week cluster quasi-experiment assigned intact rural high school classes (N\u2009=\u200998; age\u2009=\u200916.35\u2009\u00b1\u20090.48years) to: \u2022 Experimental (n\u2009=\u200950): Feature Recess-Time Sports Activities (FRTSA; 5x30-min\/week). \u2022 Control (n\u2009=\u200948): Standard supervised running. Blinded assessors conducted the National Student Physical Health Standard tests.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n FRTSA elicited significant improvements versus control: \u2022 Speed: 50-m sprint (\n p\u2009<\u20090.001,<\/jats:italic>\n \u03b7\n \n 2<\/jats:italic>\n <\/jats:sup>\n \u2009=\u20090.18,\n d<\/jats:italic>\n \u2009=\u20090.75). \u2022 Explosive Power: Standing jump (\n p<\/jats:italic>\n \u2009=\u20090.022, \u03b7\n \n 2<\/jats:italic>\n <\/jats:sup>\n \u2009=\u20090.05,\n d<\/jats:italic>\n \u2009=\u20090.41). \u2022 Flexibility: Sit-and-reach (\n p<\/jats:italic>\n \u2009<\u20090.001, \u03b7\n \n 2<\/jats:italic>\n <\/jats:sup>\n \u2009=\u20090.12,\n d<\/jats:italic>\n \u2009=\u20090.60). \u2022 Strength: Male pull-ups (\n p<\/jats:italic>\n \u2009=\u20090.030, d\u2009=\u20090.41); female sit-ups (\n p\u2009=\u20090.029, d\u2009=\u20090.45<\/jats:italic>\n ). No endurance benefits emerged (1000m\/800m: all\n p<\/jats:italic>\n \u2009>\u20090.05,\n d<\/jats:italic>\n \u2009\u2264\u20090.18).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n FRTSA is effective in enhancing speed, explosive power, flexibility, and strength, supporting policy integration of structured activity programs in rural schools.<\/jats:p>\n <\/jats:sec>","DOI":"10.1371\/journal.pone.0337716","type":"journal-article","created":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T18:29:14Z","timestamp":1769106554000},"page":"e0337716","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":0,"title":["Feature recess-time sports activities as a school-based intervention to improve fitness in rural Chinese youth"],"prefix":"10.1371","volume":"21","author":[{"given":"Xiao Hua","family":"Huang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-6471-3646","authenticated-orcid":true,"given":"Xiao Yu","family":"Huang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fadzilah Abd","family":"Rahman","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"340","published-online":{"date-parts":[[2026,1,22]]},"reference":[{"issue":"1","key":"pone.0337716.ref001","doi-asserted-by":"crossref","first-page":"2324","DOI":"10.1186\/s12889-021-12403-2","article-title":"Family aspects, physical fitness, and physical activity associated with mental-health indicators in adolescents","volume":"21","author":"L Lema-G\u00f3mez","year":"2021","journal-title":"BMC Public Health"},{"issue":"1","key":"pone.0337716.ref002","article-title":"Physical education and student well-being: Promoting health and fitness in schools","volume":"19","author":"H Sun","year":"2024","journal-title":"PLoS One"},{"key":"pone.0337716.ref003","volume-title":"Physical best: Physical education for lifelong fitness and health","author":"J Conkle","year":"2019"},{"issue":"10298","key":"pone.0337716.ref004","doi-asserted-by":"crossref","first-page":"429","DOI":"10.1016\/S0140-6736(21)01259-9","article-title":"Physical activity behaviours in adolescence: Current evidence and opportunities for intervention","volume":"398","author":"EMF van Sluijs","year":"2021","journal-title":"Lancet"},{"issue":"6","key":"pone.0337716.ref005","doi-asserted-by":"crossref","first-page":"504","DOI":"10.3390\/bs13060504","article-title":"Lifelong fitness in ambulatory children and adolescents with cerebral palsy II: Influencing the trajectory","volume":"13","author":"SV Duff","year":"2023","journal-title":"Behav Sci (Basel)"},{"issue":"3","key":"pone.0337716.ref006","doi-asserted-by":"crossref","first-page":"162","DOI":"10.1016\/j.jesf.2020.06.002","article-title":"Health-related physical fitness indicators and clustered cardiometabolic risk factors in adolescents: A longitudinal study","volume":"18","author":"P Rold\u00e3o da Silva","year":"2020","journal-title":"J Exerc Sci Fit"},{"issue":"4","key":"pone.0337716.ref007","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1097\/CRD.0000000000000416","article-title":"Exercise, physical activity, and cardiometabolic health: insights into the prevention and treatment of cardiometabolic diseases","volume":"30","author":"P Rao","year":"2022","journal-title":"Cardiol Rev"},{"issue":"3","key":"pone.0337716.ref008","doi-asserted-by":"crossref","first-page":"1051","DOI":"10.1007\/s10648-020-09585-3","article-title":"Activity Achievement emotions and academic performance: A meta-analysis","volume":"33","author":"J Camacho-Morles","year":"2021","journal-title":"Educ Psychol Rev"},{"issue":"2","key":"pone.0337716.ref009","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1027\/2512-8442\/a000070","article-title":"The relationship between physical activity, health, and well-being","volume":"28","author":"K Klussman","year":"2021","journal-title":"Eur J Health Psychol"},{"issue":"18","key":"pone.0337716.ref010","doi-asserted-by":"crossref","first-page":"11596","DOI":"10.3390\/ijerph191811596","article-title":"The relationship among college students\u2019 physical exercise, self-efficacy, emotional intelligence, and subjective well-being","volume":"19","author":"K Wang","year":"2022","journal-title":"Int J Environ Res Public Health"},{"key":"pone.0337716.ref011","unstructured":"Ministry of Education of the People\u2019s Republic of China. 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