{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,22]],"date-time":"2025-11-22T05:24:15Z","timestamp":1763789055245,"version":"3.45.0"},"reference-count":47,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2025,11,20]],"date-time":"2025-11-20T00:00:00Z","timestamp":1763596800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100015958","name":"University of Naples \u201cParthenope\u201d","doi-asserted-by":"crossref","award":["DiSEGIM_RL_Sport-e-Salute_Martone\u2014Codice CUP: I43C23000160005"],"award-info":[{"award-number":["DiSEGIM_RL_Sport-e-Salute_Martone\u2014Codice CUP: I43C23000160005"]}],"id":[{"id":"10.13039\/100015958","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sports"],"abstract":"<jats:p>Background: Volleyball requires explosive jumps, agility, and upper and lower limb coordination. Dynamic stretching (DS) and core stability (CS) protocols are often used separately in training sessions, but little is known about their combined effects on the performance in adolescent players. This study aimed to investigate the impact of a 12-week integrated DS and CS program (StretCor), in addition to standard training, on physical performance in U-16 volleyball players. Methods: Twenty-one volunteer players (15.1 \u00b1 0.6 years) were randomly assigned to the Intervention Group (IG; n = 12) or Control Group (CG; n = 9). IG performed the StretCor protocol four times a week for twelve weeks in addition to standard volleyball training; CG continued standard volleyball training. Physical performance assessment included Countermovement Jump (CMJ), Vertec jump with run-up, isometric shoulder strength (ASH-I), dynamic balance (mSEBT), and agility (t-test) tests. Results: Significant group \u00d7 time interactions (p &lt; 0.05, \u03b72 ranged: 0.20\u20130.90) were found for CMJ height and peak power, Vertec jump, ASH-I, mSEBT scores, and t-test performance. Post hoc analyses showed improvements in IG for CMJ height (+16.5%), Vertec jump (+10.2%), shoulder strength (+11\u201314%), balance across directions (+8\u201312%), and agility (\u22125.7% t-test time). No significant changes were observed in CG. Conclusions: The present study suggests that a 12 weeks of StretCor protocol training improves jump performance, agility, dynamic balance, and upper limb strength in U-16 volleyball players. These findings also support that StretCor protocol may be beneficial for the performance when incorporated into regular training programs for adolescent athletes.<\/jats:p>","DOI":"10.3390\/sports13110413","type":"journal-article","created":{"date-parts":[[2025,11,20]],"date-time":"2025-11-20T15:00:17Z","timestamp":1763650817000},"page":"413","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Chronic Effects of a Dynamic Stretching and Core Stability Exercise Protocol on Physical Performance in U-16 Volleyball Players"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8595-1387","authenticated-orcid":false,"given":"Annamaria","family":"Mancini","sequence":"first","affiliation":[{"name":"Department of Medical, Movement and Wellness Sciences, University Parthenope, 80133 Naples, Italy"},{"name":"CEINGE-Biotecnologie Avanzate \u201cFranco Salvatore\u201d, 80145 Naples, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8547-4760","authenticated-orcid":false,"given":"Loretta Francesca","family":"Cosco","sequence":"additional","affiliation":[{"name":"Department of Medical, Movement and Wellness Sciences, University Parthenope, 80133 Naples, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vincenzo","family":"Monda","sequence":"additional","affiliation":[{"name":"Department of Economics, Law, Cybersecurity and Sport Sciences, University Parthenope, 80035 Naples, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5426-5317","authenticated-orcid":false,"given":"Gian Pietro","family":"Emerenziani","sequence":"additional","affiliation":[{"name":"Department of Clinical and Experimental Medicine, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1967-1640","authenticated-orcid":false,"given":"Domenico","family":"Martone","sequence":"additional","affiliation":[{"name":"Department of Economics, Law, Cybersecurity and Sport Sciences, University Parthenope, 80035 Naples, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0755-6143","authenticated-orcid":false,"given":"Pasqualina","family":"Buono","sequence":"additional","affiliation":[{"name":"Department of Medical, Movement and Wellness Sciences, University Parthenope, 80133 Naples, Italy"},{"name":"CEINGE-Biotecnologie Avanzate \u201cFranco Salvatore\u201d, 80145 Naples, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,11,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"733","DOI":"10.1007\/s40279-013-0053-x","article-title":"Effects of stretching on performances involving stretch-shortening cycles","volume":"43","author":"Kallerud","year":"2013","journal-title":"Sports Med."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1519\/JSC.0b013e3181b29614","article-title":"Effect of static and dynamic stretching on vertical jump performance in collegiate women volleyball players","volume":"24","author":"Dalrymple","year":"2010","journal-title":"J. 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