{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T16:43:40Z","timestamp":1792169020449,"version":"4.4.0"},"reference-count":36,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2025,4,29]],"date-time":"2025-04-29T00:00:00Z","timestamp":1745884800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["European Journal of Sport Science"],"published-print":{"date-parts":[[2025,5]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>This study aimed (i) to explore the reliability of the load\u2013velocity relationship variables (load\u2010axis intercept [<jats:italic>L<\/jats:italic><jats:sub>0<\/jats:sub>], velocity\u2010axis intercept [<jats:italic>v<\/jats:italic><jats:sub>0<\/jats:sub>], and the area under the load\u2013velocity relationship line [<jats:italic>A<\/jats:italic><jats:sub><jats:italic>line<\/jats:italic><\/jats:sub>]) obtained during the countermovement jump exercise in successive sessions and (ii) to examine the feasibility of the load\u2013velocity relationship variables to detect acute changes in the lower\u2010body maximal mechanical capacities following different velocity\u2010based training (VBT) protocols. Twenty\u2010one recreational runners completed four randomized VBT protocols (three back squat sets with three minutes of rest) on separate occasions: (i) VBT with 60% of the one\u2010repetition maximum (1RM) and 10% velocity loss (VBT<jats:sub>60\u201310<\/jats:sub>); (ii) VBT with 60% 1RM and 30% velocity loss (VBT<jats:sub>60\u201330<\/jats:sub>); (iii) VBT with 80% 1RM and 10% velocity loss (VBT<jats:sub>80\u201310<\/jats:sub>); and (iv) VBT with 80% 1RM and 30% velocity loss (VBT<jats:sub>80\u201330<\/jats:sub>). The load\u2013velocity relationship was determined before and after each VBT protocol using the two\u2010point method in the countermovement jump with a 0.5 kg load and another matching a mean velocity of 0.55\u00a0m\u00b7s<jats:sup>\u22121<\/jats:sup>. All load\u2013velocity relationship variables had an acceptable reliability (CV\u00a0\u2264\u00a05.61% and ICC\u00a0\u2265\u00a00.83, except for <jats:italic>v<\/jats:italic><jats:sub>0<\/jats:sub> between VBT<jats:sub>60\u201330<\/jats:sub> and VBT<jats:sub>80\u201310<\/jats:sub>). Both <jats:italic>v<\/jats:italic><jats:sub>0<\/jats:sub> and <jats:italic>A<\/jats:italic><jats:sub><jats:italic>line<\/jats:italic><\/jats:sub> were reduced after VBT<jats:sub>60\u201330<\/jats:sub> and VBT<jats:sub>80\u201330<\/jats:sub> (<jats:italic>p<\/jats:italic>\u00a0\u2264\u00a00.044 and ES\u00a0\u2265\u00a0\u22120.47) but not after VBT<jats:sub>60\u201310<\/jats:sub> and VBT<jats:sub>80\u201310<\/jats:sub> (<jats:italic>p<\/jats:italic>\u00a0\u2265\u00a00.066 and ES\u00a0\u2264\u00a0\u22120.37). The post\u2013pre differences were not significantly associated between VBT protocols for any load\u2013velocity relationship variable (<jats:italic>r<\/jats:italic>\u00a0\u2264\u00a00.327 and <jats:italic>p<\/jats:italic>\u00a0\u2265\u00a00.148). Although the load\u2013velocity relationship is reliable and sensitive to high\u2010repetition VBT protocols, its use to detect acute changes in the lower\u2010body maximal mechanical capacities is characterized by a high variability in individual responses.<\/jats:p>","DOI":"10.1002\/ejsc.12309","type":"journal-article","created":{"date-parts":[[2025,4,29]],"date-time":"2025-04-29T12:10:26Z","timestamp":1745928626000},"source":"Crossref","is-referenced-by-count":4,"title":["Reliability and Acute Changes in the Load\u2013Velocity Profile During Countermovement Jump Exercise Following Different Velocity\u2010Based Resistance Training Protocols in Recreational Runners"],"prefix":"10.1002","volume":"25","author":[{"given":"Alejandro","family":"P\u00e9rez\u2010Castilla","sequence":"first","affiliation":[{"name":"Department of Education Faculty of Education Sciences University of Almer\u00eda  Almer\u00eda Spain"},{"name":"SPORT Research Group (CTS\u20101024) CIBIS (Centro de Investigaci\u00f3n para el Bienestar y la Inclusi\u00f3n Social) Research Center University of Almer\u00eda  Almer\u00eda Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8295-979X","authenticated-orcid":false,"given":"Santiago A.","family":"Ruiz\u2010Alias","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport Faculty of Sport Sciences University of Granada  Granada Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rodrigo","family":"Ramirez\u2010Campillo","sequence":"additional","affiliation":[{"name":"Sport Sciences and Human Performance Laboratories Instituto de Alta Investigaci\u00f3n, Universidad de Tarapac\u00e1  Arica Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7518-8234","authenticated-orcid":false,"given":"Felipe","family":"Garc\u00eda\u2010Pinillos","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport Faculty of Sport Sciences University of Granada  Granada Spain"},{"name":"Department of Physical Education Sports and Recreation Universidad de La Frontera  Temuco Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aitor","family":"Marcos\u2010Blanco","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport Faculty of Sport Sciences University of Granada  Granada Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,4,29]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1177\/19417381231208706"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1519\/JSC.0000000000001464"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40279\u2010022\u201001651\u2010w"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40279\u2010017\u20100835\u20107"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1186\/s40798\u2010022\u201000497\u2010w"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1080\/02701367.2022.2101603"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40279\u2010017\u20100758\u20103"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40279\u2010019\u201001072\u20102"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1123\/ijspp.2021\u20100325"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1123\/ijspp.2023\u20100127"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421\u2010017\u20103786\u20107"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.1055\/s\u20100043\u2010117608"},{"key":"e_1_2_10_14_1","first-page":"36","article-title":"Spreadsheets for Analysis of Validity and Reliability","volume":"19","author":"Hopkins W. 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