{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,26]],"date-time":"2026-07-26T04:54:59Z","timestamp":1785041699125,"version":"3.55.0"},"reference-count":37,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2015,7,27]],"date-time":"2015-07-27T00:00:00Z","timestamp":1437955200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["PM&amp;R"],"published-print":{"date-parts":[[2016,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To evaluate single\u2010leg squat performance 1\u20102 years after arthroscopy for intra\u2010articular hip pathology compared with control subjects and the nonsurgical limb, and to investigate whether single\u2010leg squat performance on the operated limb was associated with hip muscle strength.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>Cross\u2010sectional study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Setting<\/jats:title><jats:p>Private physiotherapy clinic and university laboratory.<\/jats:p><\/jats:sec><jats:sec><jats:title>Participants<\/jats:title><jats:p>Thirty\u2010four participants (17 women, 36.7 \u00b1 12.6 years) 1\u20102 years after hip arthroscopy and 34 gender\u2010matched control subjects (17 women, 33.1 \u00b1 11.9 years).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Participants performed single\u2010leg squats using a standardized testing procedure. Squat performance was captured using video. Video footage was uploaded and reformatted for analyses. Hip muscle strength was measured with handheld dynamometry using reliable methods.<\/jats:p><\/jats:sec><jats:sec><jats:title>Outcome Measures<\/jats:title><jats:p>Frontal plane pelvic obliquity, hip adduction, and knee valgus were measured. Repeated measures analysis of variance evaluated between\u2010group differences, with limb as a within\u2010subjects factor (surgical versus nonsurgical) and gender as a between\u2010subjects factor (<jats:italic>P<\/jats:italic> &lt; .05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The hip arthroscopy group demonstrated significantly greater apparent hip adduction (mean difference 2.7\u00b0, 95% confidence interval [CI] 0.7\u00b0\u20104.8\u00b0) and apparent knee valgus (4.0\u00b0, 95% CI 1.0\u00b0\u20107.1\u00b0) at peak squat depth compared with control subjects. The operated limb also demonstrated significantly greater pelvic obliquity during single\u2010leg stance compared with the nonsurgical limb (1.2\u00b0, 95% CI 0.1\u00b0\u20102.3\u00b0). Women had significantly greater apparent hip adduction (standing 1.6\u00b0, 95% CI 0.5\u00b0\u20102.6\u00b0; peak squat depth 2.4\u00b0, 95% CI 0.3\u00b0\u20104.4\u00b0) and apparent knee valgus (standing 3.3\u00b0, 95% CI 1.8\u00b0\u20104.7\u00b0; peak squat depth 3.1\u00b0, 95% CI 0\u00b0\u20106.1\u00b0). Significant positive correlations were found between frontal plane angles and hip flexor and extensor peak torque (<jats:italic>P<\/jats:italic> &gt; .05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>One to 2 years after hip arthroscopy, deficits in single\u2010leg squat performance exist that have the potential to increase hip joint impingement and perpetuate postoperative symptoms. Rehabilitation after hip arthroscopy should target retraining in functional single\u2010leg positions.<\/jats:p><\/jats:sec>","DOI":"10.1016\/j.pmrj.2015.07.004","type":"journal-article","created":{"date-parts":[[2015,7,27]],"date-time":"2015-07-27T07:20:54Z","timestamp":1437981654000},"page":"321-330","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":37,"title":["Single\u2010Leg Squat Performance is Impaired 1 to 2 Years After Hip Arthroscopy"],"prefix":"10.1002","volume":"8","author":[{"given":"Paula C.","family":"Charlton","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adam L.","family":"Bryant","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joanne L.","family":"Kemp","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ross A.","family":"Clark","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kay M.","family":"Crossley","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Natalie J.","family":"Collins","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2015,7,27]]},"reference":[{"key":"e_1_2_7_2_2","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000096804.78689.c2"},{"key":"e_1_2_7_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2009.05.021"},{"key":"e_1_2_7_4_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546509333078"},{"key":"e_1_2_7_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jmpt.2005.08.018"},{"key":"e_1_2_7_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.csm.2011.01.001"},{"key":"e_1_2_7_7_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546513488861"},{"key":"e_1_2_7_8_2","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.G.01267"},{"key":"e_1_2_7_9_2","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2011-090428"},{"key":"e_1_2_7_10_2","first-page":"334","article-title":"Is hip range of motion and strength impaired in people with hip chondrolabral pathology?","volume":"14","author":"Kemp J.L.","year":"2014","journal-title":"J Musculoskelet Neuronal Interact"},{"key":"e_1_2_7_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/acr.22193"},{"key":"e_1_2_7_12_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546510395456"},{"key":"e_1_2_7_13_2","doi-asserted-by":"publisher","DOI":"10.1186\/1471-2474-11-265"},{"key":"e_1_2_7_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ptsp.2012.06.001"},{"key":"e_1_2_7_15_2","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2013-093312"},{"key":"e_1_2_7_16_2","doi-asserted-by":"publisher","DOI":"10.1080\/01688637908401098"},{"key":"e_1_2_7_17_2","doi-asserted-by":"publisher","DOI":"10.1186\/1471-2474-4-10"},{"key":"e_1_2_7_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2012.03.013"},{"key":"e_1_2_7_19_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546513494173"},{"key":"e_1_2_7_20_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsams.2012.11.887"},{"key":"e_1_2_7_21_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546510378081"},{"key":"e_1_2_7_22_2","doi-asserted-by":"publisher","DOI":"10.1249\/01.mss.0000218140.05074.fa"},{"key":"e_1_2_7_23_2","volume-title":"Foundations of Clinical Research: Applications to Practice","author":"Portney L.G.","year":"2009"},{"key":"e_1_2_7_24_2","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.2008.2706"},{"key":"e_1_2_7_25_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.csm.2009.12.007"},{"key":"e_1_2_7_26_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.clinbiomech.2003.10.008"},{"key":"e_1_2_7_27_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2008.10.004"},{"key":"e_1_2_7_28_2","doi-asserted-by":"publisher","DOI":"10.1191\/026921599674996411"},{"key":"e_1_2_7_29_2","doi-asserted-by":"publisher","DOI":"10.1177\/107110070402501114"},{"key":"e_1_2_7_30_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-008-0680-y"},{"key":"e_1_2_7_31_2","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199611150-00014"},{"key":"e_1_2_7_32_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00221-003-1814-9"},{"key":"e_1_2_7_33_2","first-page":"1","article-title":"Can local muscles augment stability in the hip? A narrative literature review","volume":"13","author":"Retchford T.","year":"2013","journal-title":"J Musculoskelet Neuronal Interact"},{"key":"e_1_2_7_34_2","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.2012.3987"},{"key":"e_1_2_7_35_2","doi-asserted-by":"publisher","DOI":"10.1177\/03635465030310032101"},{"key":"e_1_2_7_36_2","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.a2469"},{"key":"e_1_2_7_37_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.clinbiomech.2012.07.011"},{"key":"e_1_2_7_38_2","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.2011.3470"}],"container-title":["PM&amp;R"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1934148215009132?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1934148215009132?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1016\/j.pmrj.2015.07.004","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1016\/j.pmrj.2015.07.004","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1016\/j.pmrj.2015.07.004","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,9,10]],"date-time":"2023-09-10T17:48:26Z","timestamp":1694368106000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1016\/j.pmrj.2015.07.004"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,7,27]]},"references-count":37,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2016,4]]}},"alternative-id":["10.1016\/j.pmrj.2015.07.004"],"URL":"https:\/\/doi.org\/10.1016\/j.pmrj.2015.07.004","archive":["Portico"],"relation":{},"ISSN":["1934-1482","1934-1563"],"issn-type":[{"value":"1934-1482","type":"print"},{"value":"1934-1563","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,7,27]]},"assertion":[{"value":"2015-04-16","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2015-07-16","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2015-07-27","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}