{"id":"https://openalex.org/W2802896973","doi":"https://doi.org/10.3390/sports6020038","title":"Relative Age Effect in Swedish Male and Female Tennis Players Born in 1998\u20132001","display_name":"Relative Age Effect in Swedish Male and Female Tennis Players Born in 1998\u20132001","publication_year":2018,"publication_date":"2018-04-23","ids":{"openalex":"https://openalex.org/W2802896973","doi":"https://doi.org/10.3390/sports6020038","mag":"2802896973","pmid":"https://pubmed.ncbi.nlm.nih.gov/29910342","pmcid":"https://www.ncbi.nlm.nih.gov/pmc/articles/6026833"},"language":"en","primary_location":{"id":"doi:10.3390/sports6020038","doi":"https://doi.org/10.3390/sports6020038","is_oa":true,"landing_page_url":"https://doi.org/10.3390/sports6020038","pdf_url":"https://www.mdpi.com/2075-4663/6/2/38/pdf?version=1525349550","source":{"id":"https://openalex.org/S4210234981","display_name":"Sports","issn_l":"2075-4663","issn":["2075-4663"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","norway-1","poland-20","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sports","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","doaj","pubmed"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/2075-4663/6/2/38/pdf?version=1525349550","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5032540691","display_name":"G\u00f6ran Gerdin","orcid":"https://orcid.org/0000-0003-2922-1993","observed_orcids":["https://orcid.org/0000-0003-2922-1993"]},"institutions":[{"id":"https://openalex.org/I223464139","display_name":"Linnaeus University","ror":"https://ror.org/00j9qag85","country_code":"SE","type":"education","lineage":["https://openalex.org/I223464139"]}],"countries":["SE"],"is_corresponding":true,"raw_author_name":"G\u00f6ran Gerdin","raw_affiliation_strings":["Department of Sport Science, Linnaeus University, 351 95 V\u00e4xj\u00f6, Sweden"],"raw_orcid":"https://orcid.org/0000-0003-2922-1993","affiliations":[{"raw_affiliation_string":"Department of Sport Science, Linnaeus University, 351 95 V\u00e4xj\u00f6, Sweden","institution_ids":["https://openalex.org/I223464139"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5063937404","display_name":"Marie Hedberg","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I223464139","display_name":"Linnaeus University","ror":"https://ror.org/00j9qag85","country_code":"SE","type":"education","lineage":["https://openalex.org/I223464139"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Marie Hedberg","raw_affiliation_strings":["Department of Sport Science, Linnaeus University, 351 95 V\u00e4xj\u00f6, Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Sport Science, Linnaeus University, 351 95 V\u00e4xj\u00f6, Sweden","institution_ids":["https://openalex.org/I223464139"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5053309035","display_name":"Carl-Axel Hageskog","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I223464139","display_name":"Linnaeus University","ror":"https://ror.org/00j9qag85","country_code":"SE","type":"education","lineage":["https://openalex.org/I223464139"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Carl-Axel Hageskog","raw_affiliation_strings":["Department of Sport Science, Linnaeus University, 351 95 V\u00e4xj\u00f6, Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Sport Science, Linnaeus University, 351 95 V\u00e4xj\u00f6, Sweden","institution_ids":["https://openalex.org/I223464139"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5032540691"],"corresponding_institution_ids":["https://openalex.org/I223464139"],"apc_list":{"value":1800,"currency":"CHF","value_usd":2172},"apc_paid":{"value":174,"currency":"EUR","value_usd":187},"fwci":7.8518,"has_fulltext":true,"cited_by_count":37,"citation_normalized_percentile":{"value":0.96925405,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"6","issue":"2","first_page":"38","last_page":"38"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10813","display_name":"Sport Psychology and Performance","score":0.9932000041007996,"subfield":{"id":"https://openalex.org/subfields/3204","display_name":"Developmental and Educational Psychology"},"field":{"id":"https://openalex.org/fields/32","display_name":"Psychology"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},"topics":[{"id":"https://openalex.org/T10813","display_name":"Sport Psychology and Performance","score":0.9932000041007996,"subfield":{"id":"https://openalex.org/subfields/3204","display_name":"Developmental and Educational Psychology"},"field":{"id":"https://openalex.org/fields/32","display_name":"Psychology"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T10157","display_name":"Sports Performance and Training","score":0.002899999963119626,"subfield":{"id":"https://openalex.org/subfields/2732","display_name":"Orthopedics and Sports Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11674","display_name":"Sports Analytics and Performance","score":0.0015999999595806003,"subfield":{"id":"https://openalex.org/subfields/2002","display_name":"Economics and Econometrics"},"field":{"id":"https://openalex.org/fields/20","display_name":"Economics, Econometrics and Finance"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/relative-age-effect","display_name":"relative age effect","score":1.0},{"id":"https://openalex.org/keywords/tennis-players","display_name":"tennis players","score":0.8289999961853027},{"id":"https://openalex.org/keywords/date-of-birth","display_name":"birth date","score":0.8479999899864197},{"id":"https://openalex.org/keywords/gender-differences","display_name":"gender differences","score":0.703000009059906},{"id":"https://openalex.org/keywords/player-ranking","display_name":"player ranking","score":0.6100000143051147},{"id":"https://openalex.org/keywords/youth-athletes","display_name":"youth athletes","score":0.621999979019165},{"id":"https://openalex.org/keywords/player-development","display_name":"player development","score":0.7549999952316284}],"concepts":[{"id":"https://openalex.org/C189430467","wikidata":"https://www.wikidata.org/wiki/Q7293293","display_name":"Ranking (information retrieval)","level":2,"score":0.5676955580711365},{"id":"https://openalex.org/C149923435","wikidata":"https://www.wikidata.org/wiki/Q37732","display_name":"Demography","level":1,"score":0.5107043385505676},{"id":"https://openalex.org/C2908647359","wikidata":"https://www.wikidata.org/wiki/Q2625603","display_name":"Population","level":2,"score":0.45171549916267395},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.371393084526062},{"id":"https://openalex.org/C112698675","wikidata":"https://www.wikidata.org/wiki/Q37038","display_name":"Advertising","level":1,"score":0.3362463712692261},{"id":"https://openalex.org/C144024400","wikidata":"https://www.wikidata.org/wiki/Q21201","display_name":"Sociology","level":0,"score":0.26236116886138916},{"id":"https://openalex.org/C144133560","wikidata":"https://www.wikidata.org/wiki/Q4830453","display_name":"Business","level":0,"score":0.09603339433670044},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0811907947063446},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.0}],"mesh":[],"locations_count":6,"locations":[{"id":"doi:10.3390/sports6020038","doi":"https://doi.org/10.3390/sports6020038","is_oa":true,"landing_page_url":"https://doi.org/10.3390/sports6020038","pdf_url":"https://www.mdpi.com/2075-4663/6/2/38/pdf?version=1525349550","source":{"id":"https://openalex.org/S4210234981","display_name":"Sports","issn_l":"2075-4663","issn":["2075-4663"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","norway-1","poland-20","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sports","raw_type":"journal-article"},{"id":"pmh:oai:europepmc.org:4995950","doi":null,"is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/6026833","pdf_url":null,"source":{"id":"https://openalex.org/S4306400806","display_name":"Europe PMC (PubMed Central)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1303153112","host_organization_name":"European Bioinformatics Institute","host_organization_lineage":["https://openalex.org/I1303153112"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":null,"raw_type":"Text"},{"id":"pmh:oai:pubmedcentral.nih.gov:6026833","doi":null,"is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/6026833","pdf_url":null,"source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sports (Basel)","raw_type":"Text"},{"id":"pmid:29910342","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/29910342","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sports (Basel, Switzerland)","raw_type":"Journal Article"},{"id":"pmh:oai:DiVA.org:lnu-73585","doi":null,"is_oa":true,"landing_page_url":"http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-73585","pdf_url":null,"source":{"id":"https://openalex.org/S4306401598","display_name":"DiVA (Linnaeus University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I223464139","host_organization_name":"Linnaeus University","host_organization_lineage":["https://openalex.org/I223464139"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"info:eu-repo/semantics/article"},{"id":"pmh:oai:doaj.org/article:dd531f32eb7c4362b32f854207b05919","doi":null,"is_oa":false,"landing_page_url":"https://doaj.org/article/dd531f32eb7c4362b32f854207b05919","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Sports, Vol 6, Iss 2, p 38 (2018)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.3390/sports6020038","doi":"https://doi.org/10.3390/sports6020038","is_oa":true,"landing_page_url":"https://doi.org/10.3390/sports6020038","pdf_url":"https://www.mdpi.com/2075-4663/6/2/38/pdf?version=1525349550","source":{"id":"https://openalex.org/S4210234981","display_name":"Sports","issn_l":"2075-4663","issn":["2075-4663"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","norway-1","poland-20","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sports","raw_type":"journal-article"},"sustainable_development_goals":[{"display_name":"Reduced inequalities","score":0.7386000156402588,"id":"https://metadata.un.org/sdg/10"}],"sustainable_development_goals_aurora":[{"display_name":"Gender equality","score":0.6100000143051147,"id":"https://metadata.un.org/sdg/5"}],"study_designs":[{"display_name":"Observational Study","id":"https://openalex.org/study-designs/observational-study"}],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2802896973.pdf","grobid_xml":"https://content.openalex.org/works/W2802896973.grobid-xml"},"referenced_works_count":33,"referenced_works":["https://openalex.org/W918443554","https://openalex.org/W1169551950","https://openalex.org/W1509290507","https://openalex.org/W1964030892","https://openalex.org/W1972882419","https://openalex.org/W1975492070","https://openalex.org/W1985248081","https://openalex.org/W1996006760","https://openalex.org/W2008942481","https://openalex.org/W2020787089","https://openalex.org/W2024786816","https://openalex.org/W2031648200","https://openalex.org/W2032213259","https://openalex.org/W2037068964","https://openalex.org/W2040933065","https://openalex.org/W2062209048","https://openalex.org/W2068284481","https://openalex.org/W2077976839","https://openalex.org/W2087036905","https://openalex.org/W2096053659","https://openalex.org/W2121460498","https://openalex.org/W2122819476","https://openalex.org/W2124135838","https://openalex.org/W2148923270","https://openalex.org/W2162643262","https://openalex.org/W2162872109","https://openalex.org/W2168001308","https://openalex.org/W2171626266","https://openalex.org/W2171798182","https://openalex.org/W2292791554","https://openalex.org/W2410536442","https://openalex.org/W2740416788","https://openalex.org/W6741635371"],"related_works":["https://openalex.org/W4205615358","https://openalex.org/W4382315117","https://openalex.org/W4309600586","https://openalex.org/W2886489993","https://openalex.org/W4210754855","https://openalex.org/W4392546138","https://openalex.org/W1169551950","https://openalex.org/W4387492925","https://openalex.org/W4210384097","https://openalex.org/W4388666337"],"abstract_inverted_index":{"=":[0],"1835)":[1],"registered":[2],"in":[3,44,63,89,130,139,144,152,175,185,203,215,244],"the":[4,10,18,22,28,39,45,48,50,64,68,90,94,100,145,160,169,200,210,229,249],"Swedish":[5,24,204],"Tennis":[6],"Association":[7],"database":[8],"from":[9],"year":[11],"2014.":[12],"The":[13],"results":[14],"show":[15,34,199],"that":[16,106],"when":[17,158],"birth":[19,122],"dates":[20],"of":[21,59,67,80,93,99,121,141,162,217,255,260],"corresponding":[23],"population":[25],"and":[26,83,147,180,219,253],"all":[27,117],"ranked":[29,85],"players":[30,55,119],"are":[31,43],"compared,":[32],"they":[33,42],"a":[35,77,176,238],"moderate":[36],"RAE;":[37],"however,":[38],"higher":[40,82],"up":[41],"ranking":[46,218],"system,":[47],"greater":[49,78],"RAE":[51,129,157,174,187,201],"becomes.":[52],"Top":[53],"10":[54],"display":[56],"an":[57,235],"average":[58],"64.1%":[60],"being":[61,87,191],"born":[62,88],"first":[65,91],"half":[66,92],"year.":[69,95],"Some":[70],"gender":[71],"differences":[72],"were":[73],"also":[74,231],"found,":[75],"with":[76,128,193],"proportion":[79],"both":[81,138],"lower":[84],"females":[86],"In":[96],"our":[97],"discussion":[98],"findings":[101,198],"we":[102],"raise":[103],"several":[104],"issues":[105],"need":[107,211],"to":[108,111,222,241],"be":[109],"addressed":[110],"provide":[112],"more":[113],"equal":[114,224],"opportunities":[115,225],"for":[116,212,226],"junior":[118],"regardless":[120,259],"date.":[123],"Resolving":[124],"ongoing":[125],"problems":[126],"associated":[127,192],"competitive":[131],"sports":[132],"such":[133],"as":[134,190],"tennis":[135,205],"is":[136,188],"important":[137],"term":[140],"prolonged":[142],"participation":[143],"sport":[146],"increased":[148],"performance.":[149],"Suggestions":[150],"made":[151],"this":[153],"article":[154],"include":[155],"recognising":[156],"designing":[159],"format":[161],"competitions/tournaments,":[163],"not":[164],"using":[165],"official":[166],"rankings":[167],"until":[168],"juniors":[170],"get":[171],"older,":[172],"addressing":[173],"\u201cgender":[177],"sensitive\u201d":[178],"way,":[179],"conducting":[181],"further":[182,213],"in-depth":[183],"studies":[184],"which":[186,245],"understood/examined":[189],"environmental":[194],"factors.":[195],"Although":[196],"these":[197],"effect":[202],"players,":[206],"thus":[207],"pointing":[208],"at":[209],"consideration":[214],"terms":[216],"selection":[220],"procedures":[221],"ensure":[223],"player":[227,242,258],"development,":[228],"study":[230],"concludes":[232],"by":[233],"reasserting":[234],"emphasis":[236],"on":[237,248],"holistic":[239],"approach":[240],"development":[243],"coaches":[246],"focus":[247],"developmentally":[250],"appropriate":[251],"needs":[252],"potential":[254],"each":[256],"individual":[257],"their":[261],"biological":[262],"age.":[263]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":5},{"year":2024,"cited_by_count":4},{"year":2023,"cited_by_count":7},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":9},{"year":2020,"cited_by_count":4},{"year":2019,"cited_by_count":2},{"year":2018,"cited_by_count":1}],"updated_date":"2026-10-28T10:33:24.094632","created_date":"2018-05-17T00:00:00"}