{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,3]],"date-time":"2025-12-03T18:01:58Z","timestamp":1764784918799,"version":"build-2065373602"},"reference-count":41,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2022,6,22]],"date-time":"2022-06-22T00:00:00Z","timestamp":1655856000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This study aims to verify the validity of the Push Band 2.0 (PB2.0) device on the reactive strength index (RSI) measurement, using a force plate (FP) and an optical sensor device, OptoJump (OPT), as a reference. Twenty trained athletes performed 60 drop jump trials with a height box of 30 cm. A randomized repeated measures study was conducted during a single session using the PB2.0, the OPT, and the plate force manually synchronized to obtain RSI data for each jump. Validity was analyzed by contrasting three measures: the intra-class correlation coefficient (ICC), the Bland\u2013Altman test, and R2 coefficient of determination. Bland\u2013Altman analysis showed that RSI and FP for PB2.0 (media = \u22120.047; IC 93.34%) of all data were within the confidence interval, indicating a statistically reliable result. The RSI measured by the OPT and PB2.0 also provided similar values (media = \u22120.047). These data are identical to other validity measures (ICC and linear correlation) but differ in the R2 values. The explained variation of PB2.0 measures attained only 29.3% of the FP (R2 = 0.293) and 29.5% (R2 = 0.295) of the OPT assessment, showing a very low determination coefficient. The results of this study point to caution in the use of PB2.0 when measuring RSI in scientific research.<\/jats:p>","DOI":"10.3390\/s22134724","type":"journal-article","created":{"date-parts":[[2022,6,22]],"date-time":"2022-06-22T23:11:19Z","timestamp":1655939479000},"page":"4724","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["The Validity of the Push Band 2.0 on the Reactive Strength Index Assessment in Drop Jump"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2642-945X","authenticated-orcid":false,"given":"Raynier","family":"Montoro-Bomb\u00fa","sequence":"first","affiliation":[{"name":"Faculty of Sport Sciences and Physical Education, University of Coimbra, 3004-531 Coimbra, Portugal"}]},{"given":"L\u00e1zaro","family":"de la Paz Arencibia","sequence":"additional","affiliation":[{"name":"Faculty of Sports, University of Physical Culture and Sport Sciences Manuel Fajardo, Havana 10600, Cuba"}]},{"given":"Carlo","family":"Buzzichelli","sequence":"additional","affiliation":[{"name":"Faculty of Exercise and Sport Science, University of Milano, 20122 Milan, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4179-1318","authenticated-orcid":false,"given":"Paulo","family":"Miranda-Oliveira","sequence":"additional","affiliation":[{"name":"Interdisciplinary Research Centre Egas Moniz (CiiEM), Cooperativa de Ensino Superior CRL, 2829-511 Almada, Portugal"},{"name":"School of Technology and Management (ESTG), Polytechnic of Leiria, 2411-901 Leiria, Portugal"},{"name":"Portuguese Athletics Federation (FPA), 2799-538 Oeiras, Portugal"}]},{"given":"Orlando","family":"Fernandes","sequence":"additional","affiliation":[{"name":"Sport and Health Department, School of Health and Human Development, University of Evora, 7000-671 Evora, Portugal"},{"name":"Comprehensive Health Research Center (CHRC), University of Evora, 7000-671 Evora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1033-6985","authenticated-orcid":false,"given":"Am\u00e2ndio","family":"Santos","sequence":"additional","affiliation":[{"name":"Faculty of Sport Sciences and Physical Education, University of Coimbra, 3004-531 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9619-8618","authenticated-orcid":false,"given":"Luis","family":"Rama","sequence":"additional","affiliation":[{"name":"Faculty of Sport Sciences and Physical Education, University of Coimbra, 3004-531 Coimbra, Portugal"},{"name":"Research Unit for Sport and Physical Activity (CIDAF), 3004-531 Coimbra, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"27","DOI":"10.26773\/mjssm.200304","article-title":"The Effects of A 6-Week Plyometric Training Programme on Sand Versus Wooden Parquet Surfaces on the Physical Performance Parameters of Well-Trained Young Basketball Players","volume":"9","author":"Ozen","year":"2020","journal-title":"Montenegrin J. 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