{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T17:43:28Z","timestamp":1790963008849,"version":"4.1.0"},"reference-count":29,"publisher":"National Athletic Trainers' Association","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2018,4,1]]},"abstract":"<jats:sec>\n                  <jats:title>Context:\u2003<\/jats:title>\n                  <jats:p>Chronic ankle instability (CAI) is a condition characterized by range-of-motion, neuromuscular, and postural-control deficits and subjective disability, reinjury, and posttraumatic osteoarthritis. Differences have been reported in kinematics, kinetics, surface electromyography (EMG), and ground reaction forces during functional tasks performed by those with CAI. These measures are often collected independently, and the research on collecting measures simultaneously during a movement task is limited.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Objective:\u2003<\/jats:title>\n                  <jats:p>To assess the kinematics and kinetics of the lower extremity, vertical ground reaction force (vGRF), and EMG of 4 shank muscles during a drop\u2013vertical-jump (DVJ) task.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Design:\u2003<\/jats:title>\n                  <jats:p>Controlled laboratory study.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Setting:\u2003<\/jats:title>\n                  <jats:p>Motion-capture laboratory.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Patients or Other Participants:\u2003<\/jats:title>\n                  <jats:p>Forty-seven young, active adults in either the CAI (n = 24) or control (n = 23) group.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Intervention(s):\u2003<\/jats:title>\n                  <jats:p>Three-dimensional motion capture was performed using an electromagnetic motion-capture system. Lower extremity kinematics, frontal- and sagittal-plane kinetics, vGRF, and EMG of the shank musculature were collected while participants performed 10 DVJs.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Main Outcome Measure(s):\u2003<\/jats:title>\n                  <jats:p>Means and 90% confidence intervals were calculated for all measures from 100 milliseconds before to 200 milliseconds after force-plate contact.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results:\u2003<\/jats:title>\n                  <jats:p>Patients with CAI had greater inversion from 107 to 200 milliseconds postcontact (difference = 4.01\u00b0 \u00b1 2.55\u00b0), smaller plantar-flexion kinematics from 11 to 71 milliseconds postcontact (difference = 5.33\u00b0 \u00b1 2.02\u00b0), greater ankle sagittal-plane kinetics from 11 to 77 milliseconds postcontact (difference = 0.17 \u00b1 0.09 Nm\/kg) and from 107 to 200 milliseconds postcontact (difference = 0.23 \u00b1 0.03 Nm\/kg), and smaller knee sagittal-plane kinematics from 95 to 200 milliseconds postcontact (difference = 8.23\u00b0 \u00b1 0.97\u00b0) than control participants after landing. The patients with CAI had greater vGRF from 94 to 98 milliseconds postcontact (difference = 0.83 \u00b1 0.03 N\/kg) and peroneal activity from 17 to 128 milliseconds postcontact (difference = 10.56 \u00b1 4.52 N\/kg) than the control participants.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions:\u2003<\/jats:title>\n                  <jats:p>Patients with CAI presented with differences in their landing strategies that may be related to continued instability. Kinematic and kinetic changes after ground contact and greater vGRF may be related to a faulty landing strategy. The DVJ task should be considered for rehabilitation protocols in these individuals.<\/jats:p>\n               <\/jats:sec>","DOI":"10.4085\/1062-6050-481-15","type":"journal-article","created":{"date-parts":[[2018,4,18]],"date-time":"2018-04-18T14:16:48Z","timestamp":1524061008000},"page":"364-371","source":"Crossref","is-referenced-by-count":57,"title":["Lower Extremity Biomechanics During a Drop-Vertical Jump in Participants With or Without Chronic Ankle Instability"],"prefix":"10.4085","volume":"53","author":[{"given":"C. Collin","family":"Herb","sequence":"first","affiliation":[{"name":"Athletic Training & Nutrition Department, Weber State University, Ogden, UT;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kaitlyn","family":"Grossman","sequence":"first","affiliation":[{"name":"Exercise & Sport Injury Laboratory, University of Virginia, Charlottesville;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark A.","family":"Feger","sequence":"first","affiliation":[{"name":"School of Medicine, Virginia Commonwealth University, Richmond;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luke","family":"Donovan","sequence":"first","affiliation":[{"name":"Department of Kinesiology, University of North Carolina at Charlotte"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jay","family":"Hertel","sequence":"first","affiliation":[{"name":"Exercise & Sport Injury Laboratory, University of Virginia, Charlottesville;"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2557","reference":[{"issue":"13","key":"2020060411425914900_i1062-6050-53-4-364-b01","doi-asserted-by":"crossref","first-page":"1014","DOI":"10.1136\/bjsports-2013-093175","article-title":"Selection criteria for patients with chronic ankle instability in controlled research: a position statement of the International Ankle Consortium","volume":"48","author":"Gribble","year":"2014","journal-title":"Br J Sports Med"},{"issue":"3","key":"2020060411425914900_i1062-6050-53-4-364-b02","doi-asserted-by":"crossref","first-page":"353","DOI":"10.1016\/j.csm.2008.03.006","article-title":"Sensorimotor deficits with ankle sprains and chronic ankle instability","volume":"27","author":"Hertel","year":"2008","journal-title":"Clin Sports Med"},{"issue":"3","key":"2020060411425914900_i1062-6050-53-4-364-b03","first-page":"239","article-title":"Eversion strength analysis of uninjured and functionally unstable ankles","volume":"34","author":"Kaminski","year":"1999","journal-title":"J Athl Train"},{"issue":"7","key":"2020060411425914900_i1062-6050-53-4-364-b04","doi-asserted-by":"crossref","first-page":"602","DOI":"10.1016\/j.pmrj.2013.12.013","article-title":"Lower extremity muscle activation during functional exercises in patients with and without chronic ankle instability","volume":"6","author":"Feger","year":"2014","journal-title":"PM R"},{"key":"2020060411425914900_i1062-6050-53-4-364-b05","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1186\/1758-2555-3-19","article-title":"Neuromuscular training to enhance sensorimotor and functional deficits in subjects with chronic ankle instability: a systematic review and best evidence synthesis","volume":"3","author":"O'Driscoll","year":"2011","journal-title":"Sports Med Arthrosc Rehabil Ther Technol"},{"key":"2020060411425914900_i1062-6050-53-4-364-b06","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1186\/1471-2474-9-76","article-title":"Spatiotemporal postural control deficits are present in those with chronic ankle instability","volume":"9","author":"McKeon","year":"2008","journal-title":"BMC Musculoskelet Disord"},{"issue":"6","key":"2020060411425914900_i1062-6050-53-4-364-b07","doi-asserted-by":"crossref","first-page":"617","DOI":"10.1016\/j.clinbiomech.2004.03.001","article-title":"Changes in ground reaction force during jump landing in subjects with functional instability of the ankle joint","volume":"19","author":"Caulfield","year":"2004","journal-title":"Clin Biomech (Bristol, Avon)"},{"issue":"4","key":"2020060411425914900_i1062-6050-53-4-364-b08","doi-asserted-by":"crossref","first-page":"405","DOI":"10.1016\/j.clinbiomech.2005.11.010","article-title":"Ground reaction force data in functional ankle instability during two cutting movements","volume":"21","author":"Dayakidis","year":"2006","journal-title":"Clin Biomech (Bristol, Avon)"},{"issue":"4","key":"2020060411425914900_i1062-6050-53-4-364-b09","doi-asserted-by":"crossref","first-page":"232","DOI":"10.1016\/j.ptsp.2012.10.001","article-title":"Ankle kinematics of individuals with chronic ankle instability while walking and jogging on a treadmill in shoes","volume":"14","author":"Chinn","year":"2013","journal-title":"Phys Ther Sport"},{"issue":"3","key":"2020060411425914900_i1062-6050-53-4-364-b10","doi-asserted-by":"crossref","first-page":"375","DOI":"10.1123\/jsr.18.3.375","article-title":"Altered ankle kinematics and shank-rear-foot coupling in those with chronic ankle instability","volume":"18","author":"Drewes","year":"2009","journal-title":"J Sport Rehabil"},{"issue":"12","key":"2020060411425914900_i1062-6050-53-4-364-b11","doi-asserted-by":"crossref","first-page":"1970","DOI":"10.1177\/0363546506290989","article-title":"Altered neuromuscular control and ankle joint kinematics during walking in subjects with functional instability of the ankle joint","volume":"34","author":"Delahunt","year":"2006","journal-title":"Am J Sports Med"},{"issue":"2","key":"2020060411425914900_i1062-6050-53-4-364-b12","doi-asserted-by":"crossref","first-page":"168","DOI":"10.1016\/j.clinbiomech.2005.09.004","article-title":"Ankle function during gait in patients with chronic ankle instability compared to controls","volume":"21","author":"Monaghan","year":"2006","journal-title":"Clin Biomech (Bristol, Avon)"},{"issue":"6","key":"2020060411425914900_i1062-6050-53-4-364-b13","first-page":"639","article-title":"Shank-rearfoot joint coupling in young adults with chronic ankle instability: a cross-correlation analysis","volume":"55","author":"Herb","year":"2015","journal-title":"J Sports Med Phys Fitness"},{"issue":"3","key":"2020060411425914900_i1062-6050-53-4-364-b14","doi-asserted-by":"crossref","first-page":"e14","DOI":"10.1136\/bjsm.2004.011676","article-title":"Long term outcomes of inversion ankle injuries","volume":"39","author":"Anandacoomarasamy","year":"2005","journal-title":"Br J Sports Med"},{"issue":"1","key":"2020060411425914900_i1062-6050-53-4-364-b15","doi-asserted-by":"crossref","first-page":"73","DOI":"10.2165\/00007256-200737010-00006","article-title":"A systematic review on ankle injury and ankle sprain in sports","volume":"37","author":"Fong","year":"2007","journal-title":"Sports Med"},{"issue":"13","key":"2020060411425914900_i1062-6050-53-4-364-b16","doi-asserted-by":"crossref","first-page":"2279","DOI":"10.2106\/JBJS.I.01537","article-title":"The epidemiology of ankle sprains in the United States","volume":"92","author":"Waterman","year":"2010","journal-title":"J Bone Joint Surg Am"},{"issue":"6","key":"2020060411425914900_i1062-6050-53-4-364-b17","doi-asserted-by":"crossref","first-page":"685","DOI":"10.1016\/j.jsams.2008.07.003","article-title":"Dorsiflexion deficit during jogging with chronic ankle instability","volume":"12","author":"Drewes","year":"2009","journal-title":"J Sci Med Sport"},{"issue":"4","key":"2020060411425914900_i1062-6050-53-4-364-b18","first-page":"321","article-title":"The effects of fatigue and chronic ankle instability on dynamic postural control","volume":"39","author":"Gribble","year":"2004","journal-title":"J Athl Train"},{"issue":"12","key":"2020060411425914900_i1062-6050-53-4-364-b19","doi-asserted-by":"crossref","first-page":"2579","DOI":"10.1249\/MSS.0000000000000700","article-title":"Longitudinal increases in knee abduction moments in females during adolescent growth","volume":"47","author":"Hewett","year":"2015","journal-title":"Med Sci Sports Exerc"},{"key":"2020060411425914900_i1062-6050-53-4-364-b20","first-page":"2013","article-title":"Real-time biofeedback to target risk of anterior cruciate ligament injury: a technical report for injury prevention and rehabilitation","volume":"13","author":"Ford","year":"2015","journal-title":"J Sport Rehabil"},{"issue":"5","key":"2020060411425914900_i1062-6050-53-4-364-b21","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1123\/ijatt.2015-0043","article-title":"Sagittal plane gait kinematics in individuals with chronic ankle instability","volume":"21","author":"Hoch","year":"2016","journal-title":"Int J Athl Ther Train"},{"issue":"10","key":"2020060411425914900_i1062-6050-53-4-364-b22","doi-asserted-by":"crossref","first-page":"1991","DOI":"10.1002\/jor.20235","article-title":"Changes in lower limb kinematics, kinetics, and muscle activity in subjects with functional instability of the ankle joint during a single leg drop jump","volume":"24","author":"Delahunt","year":"2006","journal-title":"J Orthop Res"},{"issue":"6","key":"2020060411425914900_i1062-6050-53-4-364-b23","doi-asserted-by":"crossref","first-page":"822","DOI":"10.1016\/j.clinbiomech.2008.02.013","article-title":"Individuals with mechanical ankle instability exhibit different motion patterns than those with functional ankle instability and ankle sprain copers","volume":"23","author":"Brown","year":"2008","journal-title":"Clin Biomech (Bristol, Avon)"},{"issue":"4","key":"2020060411425914900_i1062-6050-53-4-364-b24","first-page":"487","article-title":"Proprioception and muscle strength in subjects with a history of ankle sprains and chronic instability","volume":"37","author":"Willems","year":"2002","journal-title":"J Athl Train"},{"key":"2020060411425914900_i1062-6050-53-4-364-b25","article-title":"The relationship between electromyography and muscle force","author":"Kuriki","year":"2017","journal-title":"INTECH Web site"},{"issue":"3","key":"2020060411425914900_i1062-6050-53-4-364-b26","doi-asserted-by":"crossref","first-page":"1177","DOI":"10.1152\/jappl.1990.68.3.1177","article-title":"Electromyogram power spectra frequencies associated with motor unit recruitment strategies","volume":"68","author":"Solomonow","year":"1990","journal-title":"J Appl Physiol (1985)"},{"key":"2020060411425914900_i1062-6050-53-4-364-b27","first-page":"702358","article-title":"Clinical and functional outcomes following primary repair versus reconstruction of the medial patellofemoral ligament for recurrent patellar instability","volume":"2014","author":"Tompkins","year":"2014","journal-title":"J Sports Med (Hindawi Publ Corp)"},{"issue":"6","key":"2020060411425914900_i1062-6050-53-4-364-b28","doi-asserted-by":"crossref","first-page":"329","DOI":"10.1034\/j.1600-0838.2002.00108.x","article-title":"Inversion injury biomechanics in functional ankle instability: a cadaver study of simulated gait","volume":"12","author":"Konradsen","year":"2002","journal-title":"Scand J Med Sci Sports"},{"issue":"4","key":"2020060411425914900_i1062-6050-53-4-364-b29","doi-asserted-by":"crossref","first-page":"41","DOI":"10.3810\/psm.2012.11.1987","article-title":"A new paradigm for rehabilitation of patients with chronic ankle instability","volume":"40","author":"Donovan","year":"2012","journal-title":"Phys Sportsmed"}],"container-title":["Journal of Athletic Training"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/meridian.allenpress.com\/jat\/article-pdf\/53\/4\/364\/1459966\/1062-6050-481-15.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"http:\/\/meridian.allenpress.com\/jat\/article-pdf\/53\/4\/364\/1459966\/1062-6050-481-15.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,11]],"date-time":"2025-06-11T18:56:11Z","timestamp":1749668171000},"score":1,"resource":{"primary":{"URL":"https:\/\/nata.kglmeridian.com\/view\/journals\/attr\/53\/4\/article-p364.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,4,1]]},"references-count":29,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2018,4,1]]}},"URL":"https:\/\/doi.org\/10.4085\/1062-6050-481-15","relation":{},"ISSN":["1062-6050"],"issn-type":[{"value":"1062-6050","type":"print"}],"subject":[],"published":{"date-parts":[[2018,4,1]]}}}