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Ground reaction forces were collected via force platform, and biomechanical variables were analyzed using Bayesian paired-samples t-tests and repeated-measures ANOVA.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Bayesian analyses revealed extreme evidence for pre\u2013post changes in vertical take-off velocity in both CMJ\n                      <jats:sub>AS<\/jats:sub>\n                      (BF\u2081\u2080=369.74) and CMJ\n                      <jats:sub>NAS<\/jats:sub>\n                      (BF\u2081\u2080=40.45), accompanied by extreme time\u00d7condition interaction evidence (BF\n                      <jats:sub>incl<\/jats:sub>\n                      =6142.38), indicating protocol-dependent modulation of take-off mechanics. Jump height derived from flight time showed extreme evidence in CMJ\n                      <jats:sub>AS<\/jats:sub>\n                      (BF\u2081\u2080=219.89) and very strong evidence in CMJ\n                      <jats:sub>NAS<\/jats:sub>\n                      (BF\u2081\u2080=17.48). CMJ\n                      <jats:sub>NAS<\/jats:sub>\n                      demonstrated stronger evidence for fatigue-related alterations in relative maximal power (BF\u2081\u2080=20.05), peak concentric force (BF\u2081\u2080=2.49), and late push-off acceleration (BF\u2081\u2080=12.86), whereas corresponding changes in CMJ\n                      <jats:sub>AS<\/jats:sub>\n                      were moderate or anecdotal. In contrast, average force, average power, early push-off acceleration, and eccentric braking variables showed little to no evidence for change across conditions.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>CMJ without arm swing is more sensitive to fatigue-induced alterations in lower-limb neuromuscular function, particularly in force\u2013power output and late-phase propulsion. In contrast, CMJ with arm swing preserves global performance through whole-body coordination. These findings underscore the importance of protocol selection when CMJ is used for neuromuscular monitoring and fatigue assessment.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s13102-026-01650-8","type":"journal-article","created":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T10:33:38Z","timestamp":1773311618000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Fatigue-induced alterations in arm swing contribution to countermovement jump mechanics"],"prefix":"10.1186","volume":"18","author":[{"given":"Recep","family":"Soslu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meri\u00e7","family":"Eraslan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Murat","family":"Ta\u015f","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meltem","family":"Devrilmez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"\u0130zzet","family":"K\u0131rkaya","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ali","family":"\u00d6zkan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hakan","family":"Yarar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"\u0130smail Can","family":"\u00c7uvalc\u0131o\u011flu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ali Ahmet","family":"Do\u011fan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abdullah","family":"Uysal","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sabri","family":"Gerger","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,3,12]]},"reference":[{"key":"1650_CR1","first-page":"5","volume":"7","author":"A Heishman","year":"2019","unstructured":"Heishman A, Daub B, Miller R, Brown B, Freitas E, Bemben M. 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