{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T20:15:21Z","timestamp":1793304921636,"version":"4.5.0"},"reference-count":60,"publisher":"Public Library of Science (PLoS)","issue":"5","license":[{"start":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T00:00:00Z","timestamp":1778630400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100007059","name":"Univerzita Palack\u00c3\u00a9ho v Olomouci","doi-asserted-by":"publisher","award":["IGA_FTK_2024_013"],"award-info":[{"award-number":["IGA_FTK_2024_013"]}],"id":[{"id":"10.13039\/501100007059","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:sec id=\"sec001\">\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>Plyometric jump training (PJT) is an effective means of developing speed, strength, and neuromuscular parameters in youth athletes. However, the effect of PJT on performance outcomes as a function of biological maturation remains unclear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec002\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Employing a 12-week training intervention, 37 youth male soccer players aged 10\u201318 years were stratified by biological maturity using the Mirwald equation (pre-PHV versus post-PHV) and subsequently randomized to a PJT group (pre-PHV: n\u2009=\u200910, post-PHV: n\u2009=\u200910) or a control group (pre-PHV: n\u2009=\u20097, post-PHV: n\u2009=\u200910). The PJT group trained twice per week, with sessions based on multidirectional and short ground contact time exercises. The following performance outcomes were assessed: 20-m sprint, L-run, broad jump, unilateral triple jump, countermovement jump, reactive strength index, and relative leg stiffness. A three-way ANOVA for repeated measures was used for statistical analysis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec003\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      No significant time\u2009\u00d7\u2009intervention\u2009\u00d7\u2009maturity interaction was detected for any variable (all\n                      <jats:italic>p<\/jats:italic>\n                      \u2009\u2265\u20090.21). The 20-m sprint improved significantly in both PJT groups (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009\u2264\u20090.002), whereas the control group improved only in pre-PHV (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.038). Performance in the L-run improved across all groups (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009\u2264\u20090.003), with no specific intervention effect. Broad jump improved only following PJT (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.001). Unilateral triple jump showed significant gains in both PJT groups (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009\u2264\u20090.032). Relative leg stiffness increased in both PJT groups (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009\u2264\u20090.003), while it decreased significantly in the post-PHV control group (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.013) and remained unchanged in the pre-PHV control group (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.68).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec004\">\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>PJT appears to be a suitable and effective method for developing speed, explosive power and neuromuscular performance in youth male soccer players both before and after PHV. However, our results indicate that the role of PJT in influencing physical qualities during adolescence may be different.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1371\/journal.pone.0349011","type":"journal-article","created":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T17:26:02Z","timestamp":1778693162000},"page":"e0349011","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":3,"title":["The effect of plyometric training on physical performance in youth soccer players: A randomized controlled trial with maturation status as a covariate"],"prefix":"10.1371","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-6614-0297","authenticated-orcid":true,"given":"Roman","family":"Hol\u00edk","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7236-8328","authenticated-orcid":true,"given":"Jakub","family":"Krej\u010d\u00ed","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark","family":"De Ste Croix","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michal","family":"Lehnert","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2026,5,13]]},"reference":[{"key":"pone.0349011.ref001","article-title":"Understanding the significance of plyometric training in enhancement of sports performance: a systematic review","volume":"11","author":"VS Galay","year":"2020","journal-title":"Vidyabharati Int Interdiscip Res J"},{"issue":"12","key":"pone.0349011.ref002","doi-asserted-by":"crossref","DOI":"10.1016\/j.heliyon.2024.e33063","article-title":"Maturation-specific enhancements in lower extremity explosive strength following plyometric training in adolescent soccer players: a systematic review and meta-analysis","volume":"10","author":"L Chen","year":"2024","journal-title":"Heliyon"},{"issue":"8","key":"pone.0349011.ref003","doi-asserted-by":"crossref","first-page":"2057","DOI":"10.1519\/JSC.0000000000003142","article-title":"Effect of COL5A1, GDF5, and PPARA genes on a movement screen and neuromuscular performance in adolescent team sport athletes","volume":"33","author":"P Stastny","year":"2019","journal-title":"J Strength Cond Res"},{"issue":"1","key":"pone.0349011.ref004","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1038\/s41576-021-00400-5","article-title":"The genetics of human performance","volume":"23","author":"DS Kim","year":"2022","journal-title":"Nat Rev Genet"},{"issue":"7","key":"pone.0349011.ref005","doi-asserted-by":"crossref","first-page":"705","DOI":"10.1007\/s00167-009-0813-1","article-title":"Prevention of non-contact anterior cruciate ligament injuries in soccer players. 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