{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T03:38:15Z","timestamp":1785901095619,"version":"3.56.0"},"reference-count":39,"publisher":"National Athletic Trainers' Association","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2013,12,1]]},"abstract":"<jats:sec>\n                  <jats:title>Context:<\/jats:title>\n                  <jats:p>Greater sagittal-plane energy absorption (EA) during the initial impact phase (INI) of landing is consistent with sagittal-plane biomechanics that likely increase anterior cruciate ligament (ACL) loading, but it does not appear to influence frontal-plane biomechanics. We do not know whether frontal-plane INI EA is related to high-risk frontal-plane biomechanics.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Objective:<\/jats:title>\n                  <jats:p>To compare biomechanics among INI EA groups, determine if women are represented more in the high group, and evaluate interplanar INI EA relationships.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Design:<\/jats:title>\n                  <jats:p>Descriptive laboratory study.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Setting:<\/jats:title>\n                  <jats:p>Research laboratory.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Patients or Other Participants:<\/jats:title>\n                  <jats:p>Participants included 82 (41 men, 41 women; age = 21.0 \u00b1 2.4 years, height = 1.74 \u00b1 0.10 m, mass = 70.3 \u00b1 16.1 kg) healthy, physically active volunteers.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Intervention(s):<\/jats:title>\n                  <jats:p>We assessed landing biomechanics with an electromagnetic motion-capture system and force plate.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Main Outcome Measure(s):<\/jats:title>\n                  <jats:p>We calculated frontal- and sagittal-plane total, hip, knee, and ankle INI EA. Total frontal-plane INI EA was used to create high, moderate, and low tertiles. Frontal-plane knee and hip kinematics, peak vertical and posterior ground reaction forces, and peak internal knee-varus moment (pKVM) were identified and compared across groups using 1-way analyses of variance. We used a \u03c72 analysis to evaluate male and female allocation to INI EA groups. We used simple, bivariate Pearson product moment correlations to assess interplanar INI EA relationships.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results:<\/jats:title>\n                  <jats:p>The high\u2013INI EA group exhibited greater knee valgus at ground contact, hip adduction at pKVM, and peak hip adduction than the low\u2013INI EA group (P &amp;lt; .05) and greater peak knee valgus, pKVM, and knee valgus at pKVM than the moderate\u2013 (P &amp;lt; .05) and low\u2013 (P &amp;lt; .05) INI EA groups. Women were more likely than men to be in the high\u2013INI EA group (\u03c72 = 4.909, P = .03). Sagittal-plane knee and frontal-plane hip INI EA (r = 0.301, P = .006) and sagittal-plane and frontal-plane ankle INI EA were associated (r = 0.224, P = .04). No other interplanar INI EA relationships were found (P &amp;gt; .05).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions:<\/jats:title>\n                  <jats:p>Greater frontal-plane INI EA was associated with less favorable frontal-plane biomechanics that likely result in greater ACL loading. Women were more likely than men to use greater frontal-plane INI EA. The magnitudes of sagittal- and frontal-plane INI EA were largely independent.<\/jats:p>\n               <\/jats:sec>","DOI":"10.4085\/1062-6050-48.4.10","type":"journal-article","created":{"date-parts":[[2013,8,14]],"date-time":"2013-08-14T18:48:37Z","timestamp":1376506117000},"page":"757-763","source":"Crossref","is-referenced-by-count":28,"title":["Lower Extremity Energy Absorption and Biomechanics During Landing, Part II: Frontal-Plane Energy Analyses and Interplanar Relationships"],"prefix":"10.4085","volume":"48","author":[{"given":"Marc F.","family":"Norcross","sequence":"first","affiliation":[{"name":"College of Public Health and Human Sciences, Oregon State University, Corvallis"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael D.","family":"Lewek","sequence":"first","affiliation":[{"name":"Departments of Allied Health Sciences, University of North Carolina at Chapel Hill"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Darin A.","family":"Padua","sequence":"first","affiliation":[{"name":"Departments of Exercise and Sport Science, University of North Carolina at Chapel Hill"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sandra J.","family":"Shultz","sequence":"first","affiliation":[{"name":"Department of Kinesiology, University of North Carolina at Greensboro"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul S.","family":"Weinhold","sequence":"first","affiliation":[{"name":"Departments of Orthopaedics, University of North Carolina at Chapel Hill"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. 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