{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,10]],"date-time":"2026-05-10T08:02:22Z","timestamp":1778400142350,"version":"3.51.4"},"reference-count":45,"publisher":"National Athletic Trainers' Association","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2011,11,1]]},"abstract":"<jats:p>Context: Active muscle stiffness might protect the unstable shoulder from recurrent dislocation.<\/jats:p>\n               <jats:p>Objective: To compare strength and active stiffness in participants with unilateral anterior shoulder instability and to examine the relationship between active stiffness and functional ability.<\/jats:p>\n               <jats:p>Design: Cross-sectional study.<\/jats:p>\n               <jats:p>Setting: University research laboratory.<\/jats:p>\n               <jats:p>Patients or Other Participants: Participants included 16 males (age range, 16\u201340 years; height = 179.4 \u00b1 6.1 cm; mass = 79.1 \u00b1 6.8 kg) with 2 or more episodes of unilateral traumatic anterior shoulder instability.<\/jats:p>\n               <jats:p>Main Outcome Measure(s): Active stiffness and maximal voluntary strength were measured bilaterally in participants. In addition, quality of life, function, and perceived instability were measured using the Western Ontario Stability Index, American Shoulder and Elbow Surgeons Standardized Shoulder Assessment Form, and Single Alpha Numeric Evaluation, respectively.<\/jats:p>\n               <jats:p>Results: We found less horizontal adduction strength (t15 = \u22124.092, P = .001) and less stiffness at 30% (t14 = \u22123.796, P = .002) and 50% (t12 = \u22122.341, P = .04) maximal voluntary strength in the unstable than stable shoulder. Active stiffness was not correlated with quality of life, function, or perceived instability (r range, 0.0\u20130.25; P &amp;gt; .05).<\/jats:p>\n               <jats:p>Conclusions: The observed reduction in stiffness in the unstable shoulder warrants inclusion of exercises in the rehabilitation program to protect the joint from perturbations that might lead to dislocation. The lack of association between active stiffness and quality of life, function, or perceived instability might indicate that stiffness plays a less direct role in shoulder stability.<\/jats:p>","DOI":"10.4085\/1062-6050-46.6.642","type":"journal-article","created":{"date-parts":[[2017,3,2]],"date-time":"2017-03-02T15:20:02Z","timestamp":1488468002000},"page":"642-647","source":"Crossref","is-referenced-by-count":4,"title":["Active Stiffness and Strength in People With Unilateral Anterior Shoulder Instability: A Bilateral Comparison"],"prefix":"10.4085","volume":"46","author":[{"given":"Margie","family":"Olds","sequence":"first","affiliation":[{"name":"*Health and Rehabilitation Research Centre, Auckland University of Technology, New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter","family":"McNair","sequence":"first","affiliation":[{"name":"*Health and Rehabilitation Research Centre, Auckland University of Technology, New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antoine","family":"Nordez","sequence":"first","affiliation":[{"name":"\u2020Universit\u00e9 de Nantes, Laboratoire Motricit\u00e9, Interactions, Performance, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christophe","family":"Cornu","sequence":"first","affiliation":[{"name":"\u2020Universit\u00e9 de Nantes, Laboratoire Motricit\u00e9, Interactions, Performance, France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2557","reference":[{"issue":"5","key":"2020060408321935900_i1062-6050-46-6-642-b1","doi-asserted-by":"crossref","first-page":"957","DOI":"10.2106\/00004623-195638050-00001","article-title":"Prognosis in dislocations of the shoulder","volume":"38","author":"Rowe","year":"1956","journal-title":"J Bone Joint Surg Am."},{"key":"2020060408321935900_i1062-6050-46-6-642-b2","first-page":"40","article-title":"Factors related to recurrences of anterior dislocations of 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