{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T15:37:39Z","timestamp":1791560259218,"version":"4.3.4"},"reference-count":32,"publisher":"National Athletic Trainers' Association","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2009,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n        <jats:sec>\n          <jats:title>Context:<\/jats:title>\n          <jats:p>Individuals suffering from patellofemoral pain have previously been reported to have decreased isometric strength of the hip musculature; however, no researchers have investigated concentric and eccentric torque of the hip musculature in individuals with patellofemoral pain.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Objective:<\/jats:title>\n          <jats:p>To compare concentric and eccentric torque of the hip musculature in individuals with and without patellofemoral pain.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Design:<\/jats:title>\n          <jats:p>Case control.<\/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>Twenty participants with patellofemoral pain (age \u200a=\u200a 26.8 \u00b1 4.5 years, height \u200a=\u200a 171.8 \u00b1 8.4 cm, mass \u200a=\u200a 72.4 \u00b1 16.8 kg) and 20 control participants (age \u200a=\u200a 25.6 \u00b1 2.8 years, height \u200a=\u200a 169.5 \u00b1 8.9 cm, mass \u200a=\u200a 70.0 \u00b1 16.9 kg) were tested. Volunteers with patellofemoral pain met the following criteria: knee pain greater than or equal to 3 cm on a 10-cm visual analog scale, insidious onset of symptoms not related to trauma, pain with palpation of the patellar facets, and knee pain during 2 of the following activities: stair climbing, jumping or running, squatting, kneeling, or prolonged sitting. Control participants were excluded if they had a prior history of patellofemoral pain, knee surgery in the past 2 years, or current lower extremity injury that limited participation in physical activity.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Intervention(s):<\/jats:title>\n          <jats:p>Concentric and eccentric torque of the hip musculature was measured on an isokinetic dynamometer. All volunteers performed 5 repetitions of each strength test. Separate multivariate analyses of variance were performed to compare concentric and eccentric torque of the hip extensors, abductors, and external rotators between groups.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Main Outcome Measure(s):<\/jats:title>\n          <jats:p>Average and peak concentric and eccentric torque of the hip extensors, abductors, and external rotators. Torque measures were normalized to the participant's body weight multiplied by height.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Results:<\/jats:title>\n          <jats:p>The patellofemoral pain group was weaker than the control group for peak eccentric hip abduction torque (F<jats:sub>1,38<\/jats:sub> \u200a=\u200a 6.630, <jats:italic>P<\/jats:italic> \u200a=\u200a .014), and average concentric (F<jats:sub>1,38<\/jats:sub> \u200a=\u200a 4.156, <jats:italic>P<\/jats:italic> \u200a=\u200a .048) and eccentric (F<jats:sub>1,38<\/jats:sub> \u200a=\u200a 4.963, <jats:italic>P<\/jats:italic> \u200a=\u200a .032) hip external rotation torque.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Conclusions:<\/jats:title>\n          <jats:p>The patellofemoral pain group displayed weakness in eccentric hip abduction and hip external rotation, which may allow for increased hip adduction and internal rotation during functional movements.<\/jats:p>\n        <\/jats:sec>","DOI":"10.4085\/1062-6050-44.1.7","type":"journal-article","created":{"date-parts":[[2009,12,30]],"date-time":"2009-12-30T15:36:45Z","timestamp":1262187405000},"page":"7-13","source":"Crossref","is-referenced-by-count":104,"title":["Concentric and Eccentric Torque of the Hip Musculature in Individuals With and Without Patellofemoral Pain"],"prefix":"10.4085","volume":"44","author":[{"given":"Michelle C.","family":"Boling","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Darin A.","family":"Padua","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Alexander Creighton","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2557","reference":[{"issue":"3","key":"i1062-6050-44-1-7-DeHaven1","series-title":"Am J Sports Med","first-page":"218","article-title":"Athletic injuries: comparison by age, sport, and gender.","volume":"14","author":"DeHaven, K. 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Outcomes of a weight-bearing rehabilitation program for patients diagnosed with patellofemoral pain syndrome.Arch Phys Med Rehabil2006. 87 (11):28\u201335."},{"issue":"3","key":"i1062-6050-44-1-7-Poole1","series-title":"Epidemiology","first-page":"291","article-title":"Low P-values or narrow confidence intervals: which are more durable?","volume":"12","author":"Poole, C.","year":"2001","unstructured":"Poole, C.\n          \n          Low P-values or narrow confidence intervals: which are more durable?\n          Epidemiology\n          2001. 12 (3):291\u2013294."}],"container-title":["Journal of Athletic Training"],"original-title":[],"link":[{"URL":"https:\/\/nata.kglmeridian.com\/view\/journals\/attr\/44\/1\/article-p7.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/meridian.allenpress.com\/jat\/article-pdf\/44\/1\/7\/1454910\/1062-6050-44_1_7.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/nata.kglmeridian.com\/downloadpdf\/journals\/attr\/44\/1\/article-p7.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/nata.kglmeridian.com\/downloadpdf\/journals\/attr\/44\/1\/article-p7.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,12]],"date-time":"2025-06-12T00:37:37Z","timestamp":1749688657000},"score":1,"resource":{"primary":{"URL":"https:\/\/nata.kglmeridian.com\/view\/journals\/attr\/44\/1\/article-p7.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,1]]},"references-count":32,"journal-issue":{"issue":"1"},"URL":"https:\/\/doi.org\/10.4085\/1062-6050-44.1.7","relation":{},"ISSN":["1062-6050"],"issn-type":[{"value":"1062-6050","type":"print"}],"subject":[],"published":{"date-parts":[[2009,1]]}}}