{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T08:55:41Z","timestamp":1791190541541,"version":"4.1.0"},"reference-count":44,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T00:00:00Z","timestamp":1791158400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T00:00:00Z","timestamp":1791158400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["2072021150"],"award-info":[{"award-number":["2072021150"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["European Journal of Sport Science"],"published-print":{"date-parts":[[2026,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    This study examined reactive strength responses to flywheel eccentric calf raises performed under three inertial loads and the associations between peak power and post\u2010intervention reactive strength. Thirty\u2010seven national\u2010level male track\u2010and\u2010field athletes completed three randomized crossover trials (\u2265\u00a048\u00a0h apart), each involving 3\u00a0\u00d7\u00a08 calf raises under Light (0.0281\u00a0kg\u00b7m\n                    <jats:sup>2<\/jats:sup>\n                    ), Moderate (0.0711\u00a0kg\u00b7m\n                    <jats:sup>2<\/jats:sup>\n                    ), or High (0.1011\u00a0kg\u00b7m\n                    <jats:sup>2<\/jats:sup>\n                    ) inertia. Reactive strength was assessed pre\u2010 and 4\u2010min post\u2010exercise using a 10\/5 repeated\u2010jump test measuring ground contact time (GCT), jump height (JH), and reactive strength index (RSI). Concentric and eccentric peak power (ConPP, EccPP) were recorded. JH and RSI increased after Light (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.018 and\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.001) and Moderate (both\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.001), while GCT decreased after both conditions (both\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.001). No statistically clear improvement was detected after High. Moderate produced greater RSI improvements than Light (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.008) and High (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.001), and greater JH gains than Light (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.020) and High (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.016). Light produced greater RSI gains than High (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.022), while GCT decreased more after Light and Moderate than High (both\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.001). Power\u2013performance associations varied across loads, with significant ConPP\u00a0\u00d7\u00a0Load interactions for JH (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.002) and RSI (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.003), and EccPP\u00a0\u00d7\u00a0Load interactions for JH (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.040) and RSI (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.025). Under High load, ConPP was associated with JH (\n                    <jats:italic>\u03b2<\/jats:italic>\n                    \u00a0=\u00a01.37\u00a0cm, 95% CI 0.57\u20132.16) and RSI (\n                    <jats:italic>\u03b2<\/jats:italic>\n                    \u00a0=\u00a00.086, 95% CI 0.020\u20130.153), while EccPP was associated with JH (\n                    <jats:italic>\u03b2<\/jats:italic>\n                    \u00a0=\u00a01.27\u00a0cm, 95% CI 0.42\u20132.12; all\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0\u2264\u00a00.012). Overall, greater improvements were observed 4\u2010min after light and particularly moderate inertia, whereas high\u2010load peak power was more strongly related to post\u2010intervention performance.\n                  <\/jats:p>","DOI":"10.1002\/ejsc.70264","type":"journal-article","created":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T08:31:30Z","timestamp":1791189090000},"source":"Crossref","is-referenced-by-count":0,"title":["Acute Reactive Strength Responses and Peak Power\u2013Performance Relationships After Flywheel Calf Raises in National\u2010Level Track\u2010and\u2010Field Athletes: A Randomized Crossover Trial"],"prefix":"10.1002","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-3700-6355","authenticated-orcid":false,"given":"Chen","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Physical Education Xiamen University  Xiamen China"},{"name":"School of Strength and Conditioning Training Beijing Sport University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-1871-2296","authenticated-orcid":false,"given":"Tian","family":"Huang","sequence":"additional","affiliation":[{"name":"Sports Coaching College Beijing Sport University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-5631-5819","authenticated-orcid":false,"given":"Junlong","family":"Zhang","sequence":"additional","affiliation":[{"name":"Track and Field Center of Hebei Provincial Sports Bureau  Shijiazhuang Hebei China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0951-9186","authenticated-orcid":false,"given":"Bing","family":"Yan","sequence":"additional","affiliation":[{"name":"School of Sports Medicine and Rehabilitation Beijing Sport University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4797-182X","authenticated-orcid":false,"given":"Olivier","family":"Girard","sequence":"additional","affiliation":[{"name":"School of Human Sciences (Exercise and Sport Science) University of Western Australia  Perth Western Australia Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,5]]},"reference":[{"issue":"2","key":"e_1_2_12_2_1","first-page":"223","article-title":"Relationship Between Achilles Tendon Stiffness and Ground Contact Time During Drop Jumps","volume":"17","author":"Abdelsattar M.","year":"2018","journal-title":"Journal of Sports Science and 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