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Optimal reactive strength index: Is it an accurate variable to optimize plyometric training effects on measures of physical fitness in young soccer players?

dc.creatorRamirez-Campillo R.spa
dc.creatorAlvarez C.spa
dc.creatorGarcía-Pinillos F.spa
dc.creatorSanchez-Sanchez J.spa
dc.creatorYanci J.spa
dc.creatorCastillo D.spa
dc.creatorLoturco I.spa
dc.creatorChaabene H.spa
dc.creatorMoran J.spa
dc.creatorIzquierdo M.spa
dc.date.accessioned2020-05-25T23:56:34Z
dc.date.available2020-05-25T23:56:34Z
dc.date.created2018spa
dc.description.abstractThis study aimed to compare the effects of drop-jump training using a fixed drop-box height (i.e., 30-cm [FIXED]) vs. An optimal (OPT) drop-box height (i.e., 10-cm to 40-cm: generating an OPT reactive strength index [RSI]) in youth soccer players' physical fitness. Athletes were randomly allocated to a control group (n = 24; age = 13.7 years), a fixed drop-box height group (FIXED, n = 25; age = 13.9 years), or an OPT drop-box height group (OPT, n = 24; age = 13.1 years). Before and after 7 weeks of training, tests for the assessment of jumping (countermovement jump [CMJ], 5 multiple bounds), speed (20-m sprint time), change of direction ability (CODA [Illinois test]), strength {RSI and 5 maximal squat repetition test (5 repetition maximum [RM])}, endurance (2.4-km time trial), and kicking ability (maximal kicking distance) were undertaken. Analyses revealed main effects of time for all dependent variables (p less than 0.001, d = 0.24-0.72), except for 20-m sprint time. Analyses also revealed group 3 time interactions for CMJ (p less than 0.001, d = 0.51), depth jump (DJ) (p less than 0.001, d = 0.30), 20-m sprint time (p less than 0.001, d = 0.25), CODA (p less than 0.001, d = 0.22), and 5RM (p less than 0.01, d = 0.16). Post hoc analyses revealed increases for the FIXED group (CMJ: 7.4%, d = 0.36; DJ: 19.2%, d = 0.49; CODA: 23.1%, d = 20.21; 5RM: 10.5%, d = 0.32) and the OPT group (CMJ: 16.7%, d = 0.76; DJ: 36.1%, d = 0.79; CODA: 24.4%, d = 20.34; 5RM: 18.1%, d = 0.47). Post hoc analyses also revealed increases for the OPT group in 20-m sprint time (-3.7%, d = 0.27). Therefore, to maximize the effects of plyometric training, an OPT approach is recommended. However, using adequate fixed drop-box heights may provide a rational and practical alternative. © 2018 National Strength and Conditioning Association.eng
dc.format.mimetypeapplication/pdf
dc.identifier.issn10648011
dc.identifier.issn15334287
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/22464
dc.language.isoengspa
dc.publisherNSCA National Strength and Conditioning Associationspa
dc.relation.citationEndPage893
dc.relation.citationIssueNo. 4
dc.relation.citationStartPage885
dc.relation.citationTitleJournal of Strength and Conditioning Research
dc.relation.citationVolumeVol. 32
dc.relation.ispartofJournal of Strength and Conditioning Research, ISSN:10648011, 15334287, Vol.32, No.4 (2018); pp. 885-893spa
dc.relation.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85050109304&partnerID=40&md5=e509159c4c3da381bbd66e5df234e3baspa
dc.rights.accesRightsinfo:eu-repo/semantics/openAccess
dc.rights.accesoAbierto (Texto Completo)spa
dc.source.instnameinstname:Universidad del Rosariospa
dc.source.reponamereponame:Repositorio Institucional EdocURspa
dc.subject.keywordArticlespa
dc.subject.keywordClinical articlespa
dc.subject.keywordControlled studyspa
dc.subject.keywordDependent variablespa
dc.subject.keywordEndurancespa
dc.subject.keywordFitnessspa
dc.subject.keywordFootballspa
dc.subject.keywordHeightspa
dc.subject.keywordHumanspa
dc.subject.keywordIllinoisspa
dc.subject.keywordJumpingspa
dc.subject.keywordJuvenilespa
dc.subject.keywordMaturityspa
dc.subject.keywordPlyometricsspa
dc.subject.keywordPost hoc analysisspa
dc.subject.keywordRandomized controlled trialspa
dc.subject.keywordSoccer playerspa
dc.subject.keywordVelocityspa
dc.subject.keywordAdolescentspa
dc.subject.keywordAthletic performancespa
dc.subject.keywordFitnessspa
dc.subject.keywordMalespa
dc.subject.keywordMuscle strengthspa
dc.subject.keywordPhysiologyspa
dc.subject.keywordPlyometricsspa
dc.subject.keywordProceduresspa
dc.subject.keywordRunningspa
dc.subject.keywordSoccerspa
dc.subject.keywordAdolescentspa
dc.subject.keywordAthletic performancespa
dc.subject.keywordHumansspa
dc.subject.keywordMalespa
dc.subject.keywordMuscle strengthspa
dc.subject.keywordPhysical fitnessspa
dc.subject.keywordPlyometric exercisespa
dc.subject.keywordRunningspa
dc.subject.keywordSoccerspa
dc.subject.keywordChange of directionspa
dc.subject.keywordFootballspa
dc.subject.keywordJumpingspa
dc.subject.keywordMaturityspa
dc.subject.keywordStretch-shortening cyclespa
dc.subject.keywordTraining optimizationspa
dc.titleOptimal reactive strength index: Is it an accurate variable to optimize plyometric training effects on measures of physical fitness in young soccer players?spa
dc.typearticleeng
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.type.spaArtículospa
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