{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T05:41:13Z","timestamp":1784180473512,"version":"3.55.0"},"reference-count":46,"publisher":"Georg Thieme Verlag KG","issue":"04","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int J Sports Med"],"published-print":{"date-parts":[[2021,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Current recommendations for return-to-play decision-making involve comparison of the injured limb to the uninjured limb. However, the use of the uninjured limb as a comparison for hop testing lacks empirical evidence. Thus, the purpose of this study was to determine the effects of lower extremity injury on limb symmetry and performance on the single-leg hop for distance. Two-hundred thirty-six adolescent athletes completed the single-leg hop for distance before the beginning of the season (pre-injury). Forty-four adolescent athletes sustained a lower extremity injury (22 ankle and 12 knee) and missed at least three days of sports participation. All individuals had completed the single-leg hop for distance before the beginning of the season (pre-injury) and at discharge (post-injury). Injured limb single-leg hop for distance significantly decreased at return-to-play from pre-injury with a mean decrease of 48.9 centimeters; the uninjured limb also significantly decreased, with a mean decrease of 33.8 centimeters. Limb symmetry did not significantly change pre- to post-injury with a mean difference of 1.5%. Following a lower extremity injury, single-leg hop for distance performance degrades not only for the injured limb but also the uninjured limb. However, limb symmetry did not change following a lower extremity injury.<\/jats:p>","DOI":"10.1055\/a-1244-9959","type":"journal-article","created":{"date-parts":[[2020,10,5]],"date-time":"2020-10-05T22:55:55Z","timestamp":1601938555000},"page":"344-349","source":"Crossref","is-referenced-by-count":10,"title":["Symmetry does not Indicate Recovery: Single-leg Hop Before and After a Lower Extremity Injury"],"prefix":"10.1055","volume":"42","author":[{"given":"Janet E","family":"Simon","sequence":"additional","affiliation":[{"name":"Division of Athletic Training, School of Applie 00d Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Athens"},{"name":"Ohio Musculoskeletal and Neurological Institute, Ohio University, Athens"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jae","family":"Yom","sequence":"additional","affiliation":[{"name":"Allied Health, University of Illinois at Springfield, Springfield"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dustin R","family":"Grooms","sequence":"additional","affiliation":[{"name":"Division of Athletic Training, School of Applie 00d Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Athens"},{"name":"Ohio Musculoskeletal and Neurological Institute, Ohio University, Athens"},{"name":"Division of Physical Therapy, School of Rehabilitation and Communications Science, College of Health Sciences and Professions, Ohio University, Athens"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"194","published-online":{"date-parts":[[2020,10,5]]},"reference":[{"key":"ref2","first-page":"277","article-title":"Injury patterns in selected high school sports: A review of the 1995\u20131997 seasons","volume":"34","author":"J W Powell","year":"1999","journal-title":"J Athl Train"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"1798","DOI":"10.1177\/0363546509333015","article-title":"Epidemiology of severe injuries among United States high school athletes","volume":"37","author":"C J Darrow","year":"2009","journal-title":"Am J Sports Med"},{"key":"ref4","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1097\/JSM.0b013e3180471b89","article-title":"A framework for recording recurrences, reinjuries, and exacerbations in injury surveillance","volume":"17","author":"C W Fuller","year":"2007","journal-title":"Clin J Sports Med"},{"key":"ref5","doi-asserted-by":"crossref","first-page":"1377","DOI":"10.1016\/j.joca.2014.04.029","article-title":"Functional ankle instability as a risk factor for osteoarthritis: using T2-mapping to analyze early cartilage degeneration in the ankle joint of young athletes","volume":"22","author":"T Golditz","year":"2014","journal-title":"Osteoarthritis Cartilage"},{"key":"ref6","doi-asserted-by":"crossref","first-page":"742","DOI":"10.4085\/1062-6050-50.3.05","article-title":"Physical activity levels in college students with chronic ankle instability","volume":"50","author":"T Hubbard-Turner","year":"2015","journal-title":"J Athl Train"},{"key":"ref7","first-page":"556","article-title":"An acute lateral ankle sprain significantly decreases physical activity across the lifespan","volume":"14","author":"T Hubbard-Turner","year":"2015","journal-title":"J Sports Sci Med"},{"key":"ref8","doi-asserted-by":"crossref","first-page":"423","DOI":"10.1177\/0363546513510393","article-title":"Current health related quality of life is lower in former Division I collegiate athletes than non-division I athletes","volume":"42","author":"J Simon","year":"2014","journal-title":"Am J Sports Med"},{"key":"ref9","doi-asserted-by":"crossref","first-page":"634","DOI":"10.4085\/1062-6050-46.6.634","article-title":"Functional ankle instability and health-related quality of life","volume":"46","author":"B L Arnold","year":"2011","journal-title":"J Athl Train"},{"key":"ref10","doi-asserted-by":"crossref","first-page":"758","DOI":"10.4085\/1062-6050-49.3.54","article-title":"Health-related quality of life in individuals with chronic ankle instability","volume":"49","author":"M N Houston","year":"2014","journal-title":"J Athl Train"},{"key":"ref11","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1016\/j.ptsp.2014.10.006","article-title":"Clinical and laboratory measures associated with health-related quality of life in individuals with chronic ankle instability","volume":"16","author":"M N Houston","year":"2015","journal-title":"Phys Ther Sport"},{"key":"ref12","doi-asserted-by":"crossref","first-page":"1019","DOI":"10.4085\/1062-6050-50.9.01","article-title":"Patient-reported outcome measures in individuals with chronic ankle instability: A systematic review","volume":"50","author":"M N Houston","year":"2015","journal-title":"J Athl Train"},{"key":"ref13","doi-asserted-by":"crossref","first-page":"416","DOI":"10.1136\/ip.2006.014720","article-title":"Cost of injuries from a prospective cohort study of North Carolina high school athletes","volume":"13","author":"S B Knowles","year":"2007","journal-title":"Inj Prev"},{"key":"ref14","doi-asserted-by":"crossref","first-page":"838","DOI":"10.1136\/bjsports-2017-097699","article-title":"Consensus statement on concussion in sport\u2014the 5th international conference on concussion in sport held in Berlin, October 2016","volume":"51","author":"P McCrory","year":"2017","journal-title":"Br J Sports Med"},{"key":"ref15","doi-asserted-by":"crossref","first-page":"306","DOI":"10.4085\/1062-6050-44.3.306","article-title":"National Athletic Trainers' Association position statement: Acute management of the cervical spine\u2013injured athlete","volume":"44","author":"E E Swartz","year":"2009","journal-title":"J Athl Train"},{"key":"ref16","doi-asserted-by":"publisher","first-page":"96","DOI":"10.4085\/1062-6050-47.1.96","article-title":"National Athletic Trainers' Association Position Statement: Preventing sudden death in sports","volume":"47","author":"D J Casa","year":"2012","journal-title":"J Athl Train"},{"key":"ref17","doi-asserted-by":"crossref","first-page":"804","DOI":"10.1136\/bjsports-2016-096031","article-title":"Simple decision rules can reduce reinjury risk by 84% after ACL reconstruction: The Delaware-Oslo ACL cohort study","volume":"50","author":"H Grindem","year":"2016","journal-title":"Br J Sports Med"},{"key":"ref18","first-page":"20","article-title":"Yung PSh et al. Knee stability assessment on anterior cruciate ligament injury: Clinical and biomechanical approaches","volume":"1","author":"M H Lam","year":"2009","journal-title":"Sports Med Arthrosc Rehabil Ther Technol"},{"key":"ref19","first-page":"437","article-title":"Doc, when can he go back in the game?","volume":"58","author":"M D Miller","year":"2009","journal-title":"Instr Course Lect"},{"key":"ref20","doi-asserted-by":"crossref","first-page":"459","DOI":"10.1097\/01.jsm.0000192511.38996.99","article-title":"Return to play \u2013 a personal perspective","volume":"15","author":"P Brukner","year":"2005","journal-title":"Clin J Sport Med"},{"key":"ref21","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1097\/JSM.0b013e3182095f92","article-title":"Return-to-play decisions: are they the team physician's responsibility?","volume":"21","author":"G O Matheson","year":"2011","journal-title":"Clin J Sport Med"},{"key":"ref22","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1136\/bjsm.2005.021048","article-title":"Quantifying the functional rehabilitation of injured football players","volume":"40","author":"C W Fuller","year":"2006","journal-title":"Br J Sports Med"},{"key":"ref23","doi-asserted-by":"crossref","first-page":"244","DOI":"10.5694\/j.1326-5377.2006.tb00215.x","article-title":"6. Doctor on the sidelines","volume":"184","author":"G M Verrall","year":"2006","journal-title":"Med J Aust"},{"key":"ref24","doi-asserted-by":"crossref","first-page":"840","DOI":"10.1177\/0363546506295177","article-title":"Ethics in sports medicine","volume":"35","author":"W R Dunn","year":"2007","journal-title":"Am J Sports Med"},{"key":"ref25","doi-asserted-by":"crossref","first-page":"209","DOI":"10.2165\/00007256-200434040-00001","article-title":"Is it safe to use local anaesthetic painkilling injections in professional football?","volume":"34","author":"J W Orchard","year":"2004","journal-title":"Sports Med"},{"key":"ref26","doi-asserted-by":"crossref","first-page":"2256","DOI":"10.1177\/0363546512454656","article-title":"No association of time from surgery with functional deficits in athletes after anterior cruciate ligament reconstruction: Evidence for objective return-to-sport criteria","volume":"40","author":"G D Myer","year":"2012","journal-title":"Am J Sports Med"},{"key":"ref27","doi-asserted-by":"crossref","first-page":"1212","DOI":"10.1097\/00005768-200207000-00025","article-title":"The team physician and return-to-play issues: A consensus statement","volume":"34","author":"S A Herring","year":"2002","journal-title":"Med Sci Sports Exer"},{"key":"ref28","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1016\/j.csm.2004.03.004","article-title":"Return to play after anterior cruciate ligament reconstruction","volume":"23","author":"B M Cascio","year":"2004","journal-title":"Clin Sports Med"},{"key":"ref29","doi-asserted-by":"crossref","first-page":"987","DOI":"10.1519\/JSC.0b013e31816a86cd","article-title":"Neuromuscular training techniques to target deficits before return to sport after anterior cruciate ligament reconstruction","volume":"22","author":"G D Myer","year":"2008","journal-title":"J Strength Cond Res"},{"key":"ref30","doi-asserted-by":"crossref","first-page":"1697","DOI":"10.1016\/j.arthro.2011.09.009","article-title":"Factors used to determine return to unrestricted sports activities after anterior cruciate ligament reconstruction","volume":"27","author":"S D Barber-Westin","year":"2011","journal-title":"Arthroscopy"},{"key":"ref31","doi-asserted-by":"publisher","first-page":"653","DOI":"10.1177\/107110079801901002","article-title":"Persistent disability associated with ankle sprains: A prospective examination of an athletic population","volume":"19","author":"J P Gerber","year":"1998","journal-title":"Foot Ankle Int"},{"key":"ref32","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1123\/jsr.3.3.197","article-title":"Closed kinetic chain assesment following inversion ankle sprain","volume":"3","author":"T Worrell","year":"1994","journal-title":"J Sports Rehabil"},{"key":"ref33","doi-asserted-by":"crossref","first-page":"543","DOI":"10.1016\/j.clinbiomech.2007.01.009","article-title":"Contralateral limb strength deficits after anterior cruciate ligament reconstruction using a hamstring tendon graft","volume":"22","author":"L A Hiemstra","year":"2007","journal-title":"Clin Biomech"},{"key":"ref34","doi-asserted-by":"crossref","first-page":"405","DOI":"10.1016\/j.csm.2008.02.001","article-title":"Maximizing quadriceps strength after ACL reconstruction","volume":"27","author":"R M Palmieri-Smith","year":"2008","journal-title":"Clin Sports Med"},{"key":"ref35","doi-asserted-by":"crossref","first-page":"1104","DOI":"10.1302\/0301-620X.83B8.0831104","article-title":"Effects of reconstruction of the anterior cruciate ligament on voluntary activation of quadriceps femoris a prospective twitch interpolation study","volume":"83","author":"D Urbach","year":"2001","journal-title":"J Bone Joint Surg Br"},{"key":"ref36","doi-asserted-by":"crossref","first-page":"334","DOI":"10.2519\/jospt.2017.7285","article-title":"Limb symmetry indexes can overestimate knee function after anterior cruciate ligament injury","volume":"47","author":"E Wellsandt","year":"2017","journal-title":"J Orthop Sports Phys Ther"},{"key":"ref37","doi-asserted-by":"crossref","first-page":"947","DOI":"10.1016\/j.otsr.2017.02.015","article-title":"A critical analysis of limb symmetry indices of hop tests in athletes after anterior cruciate ligament reconstruction: A case control study","volume":"103","author":"A Gokeler","year":"2017","journal-title":"Orthop Traumatol Surg Res"},{"key":"ref38","doi-asserted-by":"crossref","first-page":"813","DOI":"10.1055\/a-1015-3123","article-title":"Ethical standards in sport and exercise science research: 2020 update","volume":"40","author":"D J Harriss","year":"2019","journal-title":"Int J Sports Med"},{"key":"ref39","doi-asserted-by":"crossref","first-page":"170","DOI":"10.4085\/1062-6050-553-15","article-title":"Changes in patient-reported outcome measures from the time of injury to return to play in adolescent athletes at secondary schools with an athletic trainer","volume":"54","author":"J E Simon","year":"2019","journal-title":"J Athl Train"},{"key":"ref40","doi-asserted-by":"crossref","first-page":"204","DOI":"10.1097\/00003086-199006000-00028","article-title":"Quantitative assessment of functional limitations in normal and anterior cruciate ligament-deficient knees","volume":"255","author":"S D Barber","year":"1990","journal-title":"Clin Orthop Relat Res"},{"key":"ref41","doi-asserted-by":"crossref","first-page":"513","DOI":"10.1177\/036354659101900518","article-title":"Abnormal lower limb symmetry determined by function hop tests after anterior cruciate ligament rupture","volume":"19","author":"F R Noyes","year":"1991","journal-title":"Am J Sports Med"},{"key":"ref42","volume-title":"Statistical Power Analysis For The Behavioral Sciences","author":"J Cohen","year":"1988"},{"key":"ref43","doi-asserted-by":"crossref","first-page":"436","DOI":"10.1097\/01.jsm.0000188206.54984.65","article-title":"Return to play following muscle strains","volume":"15","author":"J Orchard","year":"2005","journal-title":"Clin J Sports Med"},{"key":"ref44","doi-asserted-by":"crossref","first-page":"1391","DOI":"10.1177\/0363546515576127","article-title":"Changes in involved and uninvolved limb function during rehabilitation after anterior cruciate ligament reconstruction: implications for limb symmetry index measures","volume":"43","author":"E Rohman","year":"2015","journal-title":"Am J Sports Med"},{"key":"ref45","doi-asserted-by":"crossref","first-page":"601","DOI":"10.2519\/jospt.2012.3871","article-title":"Current concepts for anterior cruciate ligament reconstruction: a criterion-based rehabilitation progression","volume":"42","author":"D Adams","year":"2012","journal-title":"J Orth Sports Phys Ther"},{"key":"ref46","doi-asserted-by":"crossref","first-page":"246","DOI":"10.1123\/jsr.6.3.246","article-title":"Normative data for range of motion and single-leg hop in high school athletes","volume":"6","author":"M S De Carlo","year":"1997","journal-title":"J Sports Rehabil"},{"key":"ref47","first-page":"596","article-title":"Normative data for hop tests in high school and collegiate basketball and soccer players","volume":"9","author":"B A Myers","year":"2014","journal-title":"Int J Sports Phys Ther"}],"container-title":["International Journal of Sports 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