{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T12:52:58Z","timestamp":1785761578118,"version":"3.56.0"},"reference-count":36,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T00:00:00Z","timestamp":1784246400000},"content-version":"vor","delay-in-days":16,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:00:00Z","timestamp":1782864000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Scandinavian Med Sci Sports"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Inter\u2010limb asymmetry is frequently evaluated during bilateral tasks such as the countermovement jump (CMJ), typically using discrete peak\u2010based metrics. However, these approaches may inadequately capture the complex, time\u2010varying nature of inter\u2010limb coordination. This study examined inter\u2010limb asymmetry during CMJ in youth football players using both discrete and continuous assessments, with consideration of limb dominance. Forty\u2010three male youth academy football players (14\u2009\u00b1\u20091.1\u2009years) performed three maximal bilateral CMJs with data collected using dual force platforms and three\u2010dimensional motion capture. Inter\u2010limb asymmetry was quantified using discrete symmetry indices for peak vertical ground reaction force (GRF\n                    <jats:sub>vert<\/jats:sub>\n                    ), joint displacements, and joint moments, alongside time\u2010series approaches including statistical parametric mapping (SPM1D) and the normalized symmetry index (SInorm). Asymmetry threshold breaches (\u00b110% and \u00b120%) and their duration across the movement cycle were assessed, with comparisons between dominant and non\u2010dominant limbs. Discrete metrics indicated low levels of inter\u2010limb asymmetry at the group level, with mean values typically within \u00b110% thresholds. In contrast, time\u2010series analyses revealed frequent, phase\u2010specific asymmetry within individual trials, particularly for joint moments, despite no significant group\u2010level differences identified using SPM1D. A \u00b110% GRF\n                    <jats:sub>vert<\/jats:sub>\n                    asymmetry breach occurred in every trial. Limb dominance had minimal influence, except for longer GRF\n                    <jats:sub>vert<\/jats:sub>\n                    breach durations on the non\u2010dominant limb. Inter\u2010limb asymmetry during bilateral CMJ is observed frequently when assessed using time\u2010series methods, despite apparently symmetrical discrete outcomes. These findings demonstrate that reliance on peak\u2010based symmetry metrics may overlook substantial phase\u2010specific asymmetry, with implications for the interpretation of bilateral loading during athlete monitoring and rehabilitation contexts.\n                  <\/jats:p>","DOI":"10.1111\/sms.70350","type":"journal-article","created":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T11:04:58Z","timestamp":1784286298000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Discrete Symmetry Metrics Mask Frequent Phase\u2010Specific Lower Limb Asymmetry During Bilateral Countermovement Jumping in Youth Football Players"],"prefix":"10.1111","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6275-8982","authenticated-orcid":false,"given":"Mark G. L.","family":"Sayers","sequence":"first","affiliation":[{"name":"School of Health University of the Sunshine Coast  Sippy Downs Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chloe","family":"Keogh","sequence":"additional","affiliation":[{"name":"School of Health University of the Sunshine Coast  Sippy Downs Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kelly S.","family":"Jensen","sequence":"additional","affiliation":[{"name":"School of Health University of the Sunshine Coast  Sippy Downs Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bruno P.","family":"Couto","sequence":"additional","affiliation":[{"name":"School of Health University of the Sunshine Coast  Sippy Downs Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,17]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1519\/jsc.0000000000004384"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.3390\/jcm11020360"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0286942"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.1519\/JSC.0000000000003851"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/sms.14460"},{"key":"e_1_2_12_7_1","doi-asserted-by":"publisher","DOI":"10.1080\/02640414.2017.1361894"},{"key":"e_1_2_12_8_1","doi-asserted-by":"publisher","DOI":"10.1177\/036354659101900113"},{"key":"e_1_2_12_9_1","doi-asserted-by":"publisher","DOI":"10.1249\/mss.0b013e31814fb55c"},{"key":"e_1_2_12_10_1","doi-asserted-by":"publisher","DOI":"10.1080\/02640410903428566"},{"key":"e_1_2_12_11_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13102\u2010020\u201000191\u2010y"},{"key":"e_1_2_12_12_1","doi-asserted-by":"publisher","DOI":"10.1519\/jsc.0000000000002687"},{"key":"e_1_2_12_13_1","doi-asserted-by":"publisher","DOI":"10.1080\/02640414.2015.1050601"},{"key":"e_1_2_12_14_1","doi-asserted-by":"publisher","DOI":"10.1123\/jab.29.1.61"},{"key":"e_1_2_12_15_1","doi-asserted-by":"publisher","DOI":"10.1519\/JSC.0b013e318220e0a3"},{"key":"e_1_2_12_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.bspc.2018.01.013"},{"issue":"4","key":"e_1_2_12_17_1","first-page":"172","article-title":"Use of Force Platform Variables to Quantify the Effects of Chiropractic Manipulation on Gait Symmetry","volume":"10","author":"Robinson R. 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