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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.creator | Ramirez-Campillo R. | spa |
dc.creator | Alvarez C. | spa |
dc.creator | García-Pinillos F. | spa |
dc.creator | Sanchez-Sanchez J. | spa |
dc.creator | Yanci J. | spa |
dc.creator | Castillo D. | spa |
dc.creator | Loturco I. | spa |
dc.creator | Chaabene H. | spa |
dc.creator | Moran J. | spa |
dc.creator | Izquierdo M. | spa |
dc.date.accessioned | 2020-05-25T23:56:34Z | |
dc.date.available | 2020-05-25T23:56:34Z | |
dc.date.created | 2018 | spa |
dc.description.abstract | This 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.mimetype | application/pdf | |
dc.identifier.issn | 10648011 | |
dc.identifier.issn | 15334287 | |
dc.identifier.uri | https://repository.urosario.edu.co/handle/10336/22464 | |
dc.language.iso | eng | spa |
dc.publisher | NSCA National Strength and Conditioning Association | spa |
dc.relation.citationEndPage | 893 | |
dc.relation.citationIssue | No. 4 | |
dc.relation.citationStartPage | 885 | |
dc.relation.citationTitle | Journal of Strength and Conditioning Research | |
dc.relation.citationVolume | Vol. 32 | |
dc.relation.ispartof | Journal of Strength and Conditioning Research, ISSN:10648011, 15334287, Vol.32, No.4 (2018); pp. 885-893 | spa |
dc.relation.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050109304&partnerID=40&md5=e509159c4c3da381bbd66e5df234e3ba | spa |
dc.rights.accesRights | info:eu-repo/semantics/openAccess | |
dc.rights.acceso | Abierto (Texto Completo) | spa |
dc.source.instname | instname:Universidad del Rosario | spa |
dc.source.reponame | reponame:Repositorio Institucional EdocUR | spa |
dc.subject.keyword | Article | spa |
dc.subject.keyword | Clinical article | spa |
dc.subject.keyword | Controlled study | spa |
dc.subject.keyword | Dependent variable | spa |
dc.subject.keyword | Endurance | spa |
dc.subject.keyword | Fitness | spa |
dc.subject.keyword | Football | spa |
dc.subject.keyword | Height | spa |
dc.subject.keyword | Human | spa |
dc.subject.keyword | Illinois | spa |
dc.subject.keyword | Jumping | spa |
dc.subject.keyword | Juvenile | spa |
dc.subject.keyword | Maturity | spa |
dc.subject.keyword | Plyometrics | spa |
dc.subject.keyword | Post hoc analysis | spa |
dc.subject.keyword | Randomized controlled trial | spa |
dc.subject.keyword | Soccer player | spa |
dc.subject.keyword | Velocity | spa |
dc.subject.keyword | Adolescent | spa |
dc.subject.keyword | Athletic performance | spa |
dc.subject.keyword | Fitness | spa |
dc.subject.keyword | Male | spa |
dc.subject.keyword | Muscle strength | spa |
dc.subject.keyword | Physiology | spa |
dc.subject.keyword | Plyometrics | spa |
dc.subject.keyword | Procedures | spa |
dc.subject.keyword | Running | spa |
dc.subject.keyword | Soccer | spa |
dc.subject.keyword | Adolescent | spa |
dc.subject.keyword | Athletic performance | spa |
dc.subject.keyword | Humans | spa |
dc.subject.keyword | Male | spa |
dc.subject.keyword | Muscle strength | spa |
dc.subject.keyword | Physical fitness | spa |
dc.subject.keyword | Plyometric exercise | spa |
dc.subject.keyword | Running | spa |
dc.subject.keyword | Soccer | spa |
dc.subject.keyword | Change of direction | spa |
dc.subject.keyword | Football | spa |
dc.subject.keyword | Jumping | spa |
dc.subject.keyword | Maturity | spa |
dc.subject.keyword | Stretch-shortening cycle | spa |
dc.subject.keyword | Training optimization | spa |
dc.title | Optimal reactive strength index: Is it an accurate variable to optimize plyometric training effects on measures of physical fitness in young soccer players? | spa |
dc.type | article | eng |
dc.type.hasVersion | info:eu-repo/semantics/publishedVersion | |
dc.type.spa | Artículo | spa |
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