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dc.contributor.authorHaynes, T
dc.contributor.authorBishop, C
dc.contributor.authorAntrobus, M
dc.contributor.authorBrazier, Jon
dc.date.accessioned2019-01-31T10:45:08Z
dc.date.available2019-01-31T10:45:08Z
dc.date.issued2019-02-01
dc.identifier.citationHaynes , T , Bishop , C , Antrobus , M & Brazier , J 2019 , ' The Validity and Reliability of the My Jump 2 App for Measuring the Reactive Strength Index and Drop Jump Performance ' , The Jounral of Sports Medicine and Physical Fitness , vol. 59 , no. 2 , pp. 253-258 . https://doi.org/10.23736/S0022-4707.18.08195-1
dc.identifier.issn0022-4707
dc.identifier.urihttp://hdl.handle.net/2299/21027
dc.description.abstractBACKGROUND: This is the first study to independently assess the concurrent validity and reliability of the My Jump 2 app for measuring drop jump performance. It is also the first to evaluate the app's ability to measure the reactive strength index (RSI). METHODS: Fourteen male sport science students (age: 29.5±9.9 years) performed three drop jumps from 20 cm and 40 cm (totaling 84 jumps), assessed via a force platform and the My Jump 2 app. Reported metrics included reactive strength index, jump height, ground contact time, and mean power. Measurements from both devices were compared using the intraclass correlation coefficient (ICC), Pearson product moment correlation coefficient (r), Cronbach's alpha (α), coefficient of variation (CV) and Bland-Altman plots. RESULTS: Near perfect agreement was seen between devices at 20 cm for RSI (ICC=0.95) and contact time (ICC=0.99) and at 40 cm for RSI (ICC=0.98), jump height (ICC=0.96) and contact time (ICC=0.92); with very strong agreement seen at 20 cm for jump height (ICC=0.80). In comparison with the force plate the app showed good validity for RSI (20 cm: r=0.94; 40 cm; r=0.97), jump height (20 cm: r=0.80; 40 cm; r=0.96) and contact time (20 cm=0.96; 40 cm; r=0.98). CONCLUSIONS: The results of the present study show that the My Jump 2 app is a valid and reliable tool for assessing drop jump performance.en
dc.format.extent6
dc.format.extent720449
dc.language.isoeng
dc.relation.ispartofThe Jounral of Sports Medicine and Physical Fitness
dc.subjectphysical performance
dc.subjectdrop jumps
dc.subjectPlyometrics
dc.subjecttesting
dc.titleThe Validity and Reliability of the My Jump 2 App for Measuring the Reactive Strength Index and Drop Jump Performanceen
dc.contributor.institutionSchool of Life and Medical Sciences
dc.contributor.institutionCentre for Research in Psychology and Sport Sciences
dc.contributor.institutionHigh Performance Sport Research Group
dc.contributor.institutionDepartment of Psychology, Sport and Geography
dc.contributor.institutionExercise, Health and Wellbeing Research Group
dc.description.statusPeer reviewed
dc.date.embargoedUntil2019-03-27
dc.identifier.urlhttps://www.minervamedica.it/en/journals/sports-med-physical-fitness/article.php?cod=R40Y9999N00A18032708#
rioxxterms.versionofrecord10.23736/S0022-4707.18.08195-1
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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