{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T02:22:16Z","timestamp":1791166936162,"version":"4.1.0"},"reference-count":35,"publisher":"SAGE Publications","issue":"9","license":[{"start":{"date-parts":[[2011,5,27]],"date-time":"2011-05-27T00:00:00Z","timestamp":1306454400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Am J Sports Med"],"published-print":{"date-parts":[[2011,9]]},"abstract":"<jats:p>Background: Ankle sprain is a common sports injury. While the effects of static constraints in stabilizing the ankle joint are relatively well understood, those of dynamic constraints are less clear and require further investigation.<\/jats:p>\n                  <jats:p>Purpose: This study was undertaken to evaluate the dynamic stability of the ankle joint during the landing phase of running and stop-jump maneuvers in athletes with and without chronic ankle instability (CAI).<\/jats:p>\n                  <jats:p>Study Design: Controlled laboratory study.<\/jats:p>\n                  <jats:p>Methods: Fifteen athletes with CAI and 15 age-matched athletes without CAI performed running and stop-jump landing tasks. The dynamic ankle joint stiffness, tibialis anterior (TA)\/peroneus longus (PL) and TA\/gastrocnemius lateralis (GL) co-contraction indices, ankle joint angle, and root-mean-square (RMS) of the TA, PL, and GL electromyographic signals were measured during each task.<\/jats:p>\n                  <jats:p>Results: During running, the CAI group exhibited a greater ankle inversion angle than the control group in the pre-landing phase ( P = .012-.042) and a lower dynamic ankle joint stiffness in the post-landing phase (CAI: 0.109 \u00b1 0.039 N\u00b7m\/deg; control: 0.150 \u00b1 0.068 N\u00b7m\/deg; P = .048). In the stop-jump landing task, athletes with CAI had a significantly lower TA\/PL co-contraction index during the pre-landing phase (CAI: 49.1 \u00b1 19; control: 64.8 \u00b1 16; P = .009). In addition, the CAI group exhibited a greater ankle inversion ( P = .049), a lower peak eversion ( P = .04), and a smaller RMS of the PL electromyographic signal in the post-landing phase (CAI: 0.73 \u00b1 0.32; control: 0.51 \u00b1 0.22; P = .04).<\/jats:p>\n                  <jats:p>Conclusion: Athletes with CAI had a relatively inverted ankle, reduced muscle co-contraction, and a lower dynamic stiffness in the ankle joint during the landing phase of sports maneuvers and this may jeopardize the stability of the ankle.<\/jats:p>\n                  <jats:p>Clinical Relevance: Sports training or rehabilitation programs should differentiate between the pre-landing and post-landing phases of sports maneuvers, and should educate athletes to land with an appropriate ankle position and muscle recruitment.<\/jats:p>","DOI":"10.1177\/0363546511406868","type":"journal-article","created":{"date-parts":[[2011,5,27]],"date-time":"2011-05-27T22:32:39Z","timestamp":1306535559000},"page":"2007-2015","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":91,"title":["Dynamic Ankle Control in Athletes With Ankle Instability During Sports Maneuvers"],"prefix":"10.1177","volume":"39","author":[{"given":"Cheng-Feng","family":"Lin","sequence":"first","affiliation":[{"name":"Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chin-Yang","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chia-Wei","family":"Lin","sequence":"additional","affiliation":[{"name":"Institute of Biomedical Engineering, College of Engineering, National Cheng Kung University, Tainan, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2011,5,27]]},"reference":[{"issue":"2","key":"bibr1-0363546511406868","first-page":"295","volume":"42","author":"Agel J","year":"2007","journal-title":"J Athl Train"},{"key":"bibr2-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2004.011676"},{"key":"bibr3-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/S0268-0033(03)00071-8"},{"key":"bibr4-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/0966-6362(95)01045-9"},{"key":"bibr5-0363546511406868","volume-title":"Anatomic Guide for the Electromyographer","author":"Delagi E","year":"1981"},{"issue":"4","key":"bibr6-0363546511406868","first-page":"507","volume":"37","author":"Demeritt KM","year":"2002","journal-title":"J Athl Train"},{"issue":"2","key":"bibr7-0363546511406868","first-page":"194","volume":"42","author":"Dick R","year":"2007","journal-title":"J Athl Train"},{"key":"bibr8-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/S1050-6411(03)00035-X"},{"key":"bibr9-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsams.2008.07.003"},{"key":"bibr10-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1123\/jsr.18.3.375"},{"key":"bibr11-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9290(98)00170-5"},{"key":"bibr12-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.47B4.678"},{"key":"bibr13-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/j.ptsp.2007.08.002"},{"key":"bibr14-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.33.4.255"},{"key":"bibr15-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1123\/ijsb.7.3.303"},{"key":"bibr16-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/j.apmr.2006.05.022"},{"key":"bibr17-0363546511406868","volume-title":"Daniels and Worthingham\u2019s Muscle Testing: Techniques of Manual Examination","author":"Hislop HJ","year":"2002","edition":"7"},{"key":"bibr18-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-002-0673-6"},{"key":"bibr19-0363546511406868","doi-asserted-by":"publisher","DOI":"10.3113\/FAI.2008.0305"},{"key":"bibr20-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/S1050-6411(03)00020-8"},{"key":"bibr21-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1097\/00005768-200201000-00025"},{"key":"bibr22-0363546511406868","volume-title":"Orthopedic Physical Assessment","author":"Magee DJ","year":"2002","edition":"4"},{"issue":"1","key":"bibr23-0363546511406868","first-page":"135","volume":"42","author":"Morrison KE","year":"2007","journal-title":"J Athl Train"},{"key":"bibr24-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1177\/107110070602701117"},{"key":"bibr25-0363546511406868","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.I.00869"},{"issue":"1","key":"bibr26-0363546511406868","first-page":"71","volume":"37","author":"Riemann BL","year":"2002","journal-title":"J Athl Train"},{"issue":"1","key":"bibr27-0363546511406868","first-page":"80","volume":"37","author":"Riemann BL","year":"2002","journal-title":"J Athl Train"},{"key":"bibr28-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-200110000-00013"},{"key":"bibr29-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/j.gaitpost.2006.10.013"},{"key":"bibr30-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1055\/s-2004-821064"},{"key":"bibr31-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/j.jelekin.2007.10.007"},{"key":"bibr32-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1055\/s-2008-1025777"},{"key":"bibr33-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1249\/MSS.0b013e3181ad1e2f"},{"key":"bibr34-0363546511406868","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-200636050-00003"},{"key":"bibr35-0363546511406868","doi-asserted-by":"publisher","DOI":"10.1016\/S0020-1383(98)80203-9"}],"container-title":["The American Journal of Sports Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0363546511406868","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/0363546511406868","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0363546511406868","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T09:41:24Z","timestamp":1777369284000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/0363546511406868"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2011,5,27]]},"references-count":35,"journal-issue":{"issue":"9","published-print":{"date-parts":[[2011,9]]}},"alternative-id":["10.1177\/0363546511406868"],"URL":"https:\/\/doi.org\/10.1177\/0363546511406868","relation":{},"ISSN":["0363-5465","1552-3365"],"issn-type":[{"value":"0363-5465","type":"print"},{"value":"1552-3365","type":"electronic"}],"subject":[],"published":{"date-parts":[[2011,5,27]]}}}